Last updated 2026-08-18
TL;DR
Colorado has no state-issued six-pack captain license. You need the federal USCG Operator of Uninspected Passenger Vessels (OUPV) credential, sometimes called a six-pack license, issued by the U.S. Coast Guard. Federal fees run about $220 combined. Everything in adds up to roughly $385 to $950. The full paper path takes most people 3 to 6 months once sea service is done.
Do you need a license to run a six-pack charter in Colorado?
Yes, and the license is federal. Colorado does not issue its own six-pack captain credential, so there's nothing to get from the state that lets you carry paying passengers. If you take passengers for hire on a vessel you operate, even on a Colorado lake or reservoir, you need the U.S. Coast Guard's OUPV (Operator of Uninspected Passenger Vessels) license, issued under 46 U.S.C. § 8903 [1]. That statute applies to any vessel carrying six or fewer passengers for hire on U.S. waters, which covers most navigable rivers, reservoirs, and lakes in Colorado.
No Colorado Division of Parks and Wildlife license substitutes for the USCG credential. A Colorado boating education certificate is a separate, mostly recreational requirement, and it does not authorize you to carry passengers for hire [2]. You can hold both. Neither replaces the other.
Here's the thing that trips people up. If you only operate on private, non-navigable waters that sit entirely within Colorado and have no connection to interstate commerce, the federal requirement gets murky. But nearly every commercial charter on Colorado's major waters (Lake Granby, Blue Mesa, Dillon Reservoir, the Colorado River) happens where the USCG asserts jurisdiction. The safe, standard, professional answer is simple: get the OUPV.
What is the USCG OUPV license and why does it govern Colorado captains?
OUPV stands for Operator of Uninspected Passenger Vessels. The Coast Guard issues it under 46 C.F.R. Part 10 and Part 11 [3]. "Uninspected" doesn't mean unsafe. It means the vessel itself doesn't need a formal Coast Guard inspection certificate, unlike larger commercial vessels. Six passengers for hire is the ceiling, which is where the nickname "six-pack license" comes from.
The credential comes in two geographic flavors: Near Coastal (up to 100 miles offshore) and Inland (rivers, lakes, and bays). Almost every Colorado operator needs Inland. You can add Near Coastal if you want the broader scope, but it takes extra sea service on coastal waters.
The USCG processes OUPV applications through its National Maritime Center (NMC) in Martinsburg, West Virginia, no matter what state you live in. There's no Colorado NMC office. You submit paperwork to the NMC, pass an approved exam at a Regional Exam Center (REC) or approved testing provider, and the credential comes back from the federal system.
The OUPV is a Merchant Mariner Credential (MMC), a wallet-sized federal document. It's valid for 5 years. Renewal each cycle requires proof of continued sea service and a medical exam [3].
How much does a six-pack captain license cost in Colorado?
Your total has several layers, and the federal fees are just the floor. Nothing here is a Colorado surcharge. There's no state fee stacked on top.
Federal NMC fees (the non-negotiable part)
A new original MMC/OUPV application costs $95 for a 5-year credential, per the NMC fee schedule [4]. Confirm the current figure before you apply, because Congress adjusts these from time to time. A separate Transportation Worker Identification Credential (TWIC) fee runs about $125.25 for most applicants, paid to TSA [5]. So the two federal fees alone come to roughly $220 before you spend a dollar on anything else.
First aid and CPR
The OUPV requires a current first aid and CPR certificate. A basic Red Cross or AHA course in Colorado runs about $50 to $100 depending on the provider and format.
Drug test
A DOT-compliant 5-panel drug test is required. Expect $40 to $80 at a clinic.
Physical exam
A USCG-compliant medical exam on form CG-719K is required. Most occupational medicine clinics and some primary care offices do it. Fees run $75 to $150 in Colorado.
Exam prep and the written test
You take a written exam covering rules of the road, navigation, safety, and seamanship. Prep costs vary a lot. Some people self-study using free USCG materials and pass with no paid course. Others spend $150 to $400 on structured prep. OUPVPath offers a one-time $149 USCG OUPV + Bareboat prep kit at /start if you want a structured path without paying for a live classroom.
The table below shows the realistic range for a Colorado applicant.
| Cost Item | Low Estimate | High Estimate |
|---|---|---|
| NMC MMC application fee | $95 | $95 |
| TWIC (TSA) | $125 | $125 |
| Medical exam (CG-719K) | $75 | $150 |
| Drug test | $40 | $80 |
| First aid / CPR | $50 | $100 |
| Exam prep (optional) | $0 | $400 |
| Total | $385 | $950 |
Confirm all federal fees directly with the NMC before submitting, since fee schedules do change [4].
How long does it take to get a six-pack captain license in Colorado?
Most people take 3 to 6 months, and the single biggest variable is how fast you rack up sea service days. This is not something you apply for and receive in a few weeks. Sea time is the gate.
Sea service: the real timeline driver
An Inland OUPV needs 360 days of sea service on U.S. waters, with at least 90 of those days in the past 3 years, under 46 C.F.R. § 11.467 [3]. A "day" of sea service means a period of at least 4 hours. If you're already an experienced boater with a logbook full of documented days, you may already be there. Starting fresh while working another job, building 360 days can take 2 to 3 years of active boating seasons.
Colorado's boating season runs roughly May through October. That's about 180 days a year if you're on the water daily. Very few people are. An active recreational boater in Colorado might log 30 to 60 sea service days per season, which puts full qualification at 3 to 6 seasons.
One path speeds this up. If you've worked commercially on any vessel (kayak guide, raft guide, ferry operator) and kept records, those days often count. Ask an NMC-approved credential advisor what qualifies.
Processing time after you submit
Once your complete application reaches the NMC, processing times vary. The NMC posts current times on its website. Historically they've run from a few weeks to several months depending on volume and completeness. An incomplete application resets the clock, so send a clean package the first time [4].
The exam
After the NMC issues an authorization to test, you schedule and pass the written exam. Testing at a Regional Exam Center or approved proctoring location in Colorado is generally available within a few weeks of authorization.
What are the sea service requirements for Colorado applicants?
The USCG's 46 C.F.R. § 11.467 sets the sea service bar for an Inland OUPV [3]. You need 360 days total on U.S. waters, at least 90 of them within the 3 years before you apply, and each day has to be at least 4 hours to count as a full day.
For a Near Coastal endorsement instead of or on top of Inland, you need 360 days with at least 90 on ocean or near coastal waters. That's a harder bar for a landlocked state, but some Colorado guides and instructors build that time during off-seasons on the coast.
You document sea service using the USCG's sea service form (CG-719S), an employer letter, or both. Recreational sea service counts. A personal logbook alone is not enough. You need a form signed by someone who can verify the service, or self-certification with supporting documentation.
Read the NMC's guidance on what qualifies before you start logging days. Rafting rivers, running motorized watercraft on reservoirs, fishing guide work, and similar activities on navigable U.S. waters can all count, but the specific vessel type and waters matter [3].
What else does the USCG require besides sea service?
Sea service is the big one. Several other boxes have to be checked before the NMC will issue your credential.
Age and citizenship: You must be at least 18. You must be a U.S. citizen or a documented alien who qualifies under 46 U.S.C. § 7101 [1].
Medical exam: A licensed physician completes form CG-719K confirming you meet the USCG's medical standards, which cover vision, hearing, and general fitness. Those standards live in 46 C.F.R. Part 10 Subpart C [3]. The exam must have been done within 12 months of your application.
Drug test: A DOT/USCG-compliant drug test with negative results, conducted by a certified collector using a DOT-certified lab.
First aid and CPR: Current certification from an approved provider. American Red Cross and American Heart Association courses qualify.
TWIC (Transportation Worker Identification Credential): Required for the OUPV. You apply separately through TSA, which runs a background check. The full list of disqualifying offenses sits in 49 C.F.R. § 1572.103 [6].
Character and fitness: The NMC reviews criminal history. Certain convictions are disqualifying under 46 U.S.C. § 7703, though a waiver process exists for some offenses [9].
Written exam: After the NMC reviews and approves your application, it issues an authorization to test. The exam covers the Rules of the Road, chart navigation, seamanship, weather, first aid, and federal regulations. The USCG publishes its question bank modules publicly [7].
Is there a Colorado state boating license or endorsement you also need?
Sort of, but it's not a six-pack license.
Colorado requires anyone born on or after January 1, 1949, who operates a motorized vessel on state waters to carry a boating safety education certificate [2]. Colorado Parks and Wildlife runs this through approved boater education courses. The certificate itself is free to get (course fees vary by provider) and does not expire.
This is not a commercial credential. It won't let you carry passengers for hire. It's a safety education certificate, and for most professional captains it's a lower bar than the USCG requirements they're already clearing.
If you're operating under Coast Guard OUPV rules, you're well past the competency baseline the state certificate targets. Still, if you haven't taken an approved course, technically you need it to legally operate a motorized vessel on Colorado waters. Colorado Parks and Wildlife lists approved course providers on its website [2].
There is no separate Colorado commercial captain's license, charter boat license, or six-pack endorsement from the state. The federal OUPV is the credential.
How do you actually apply for the OUPV license from Colorado?
The path is entirely federal and mostly online. Here's the real sequence.
Step 1: Get your TWIC first. Apply through the TSA TWIC program. It takes 4 to 6 weeks to arrive and you need it (or at least the receipt of approval) before the NMC can issue your credential. Apply at a TWIC enrollment center. Colorado has locations in Denver and other cities [5].
Step 2: Complete your medical exam. Take the CG-719K form to a licensed physician. They fill it out and you keep it for your application package.
Step 3: Get your drug test. Use a DOT-certified facility. The result must be negative and the paperwork current. Confirm the exact window with NMC guidance before you file.
Step 4: Complete first aid and CPR. Get a current card from an approved provider.
Step 5: Compile your sea service documentation. Use form CG-719S or employer letters. Get everything signed and organized.
Step 6: Submit to the NMC. Apply online through the NMC portal or mail a paper application to the NMC in Martinsburg, WV. Online is faster. Pay the application fee [4].
Step 7: Authorization to test. Once the NMC approves your application, it issues an authorization. Schedule your written exam at an approved location. Colorado captains often test at approved proctoring sites near Denver.
Step 8: Pass the exam, receive your MMC. After a passing score reaches the NMC, it issues your Merchant Mariner Credential.
For a structured approach to the written portion, the how to start six-pack captain in Colorado guide covers the prep sequence in more detail.
What Colorado waters can you operate on with an Inland OUPV?
An Inland OUPV covers navigable U.S. waters that are not ocean or near coastal. In Colorado, that means rivers and reservoirs treated as U.S. navigable waters under federal jurisdiction.
The Colorado River, Gunnison River, Arkansas River, Blue Mesa Reservoir, Lake Granby, Dillon Reservoir, and Horsetooth Reservoir are among the waters where commercial six-pack charters run. If you want to fish guide, offer sunset cruises, or run day charters on these waters, Inland OUPV covers you.
On waters that are entirely privately owned, entirely within one state, and cut off from interstate commerce or federal navigation, the USCG's jurisdiction gets fuzzy. In practice, most attorneys and NMC credential consultants tell commercial operators to hold the OUPV rather than argue a jurisdictional exception. It's cheaper than a legal fight.
If you also guide out of state (coastal waters in the off-season, say), a Near Coastal endorsement makes sense. But it needs documented coastal sea service, which means building time outside Colorado.
How does the Colorado six-pack license process compare to other states?
The federal OUPV requirements are identical in every state, because the credential is federal. Sea service thresholds, exam content, fees, medical standards: all the same whether you're in Colorado, Alaska, or Florida [3].
What differs by state is the context.
- Sea-building opportunity: Coastal states (Florida, Alaska, Washington) have year-round access to navigable waters, so 360 sea service days come faster. Colorado's inland, seasonal waters slow this down for residents who don't travel.
- Exam and TWIC center access: Coastal states have more REC locations and TWIC enrollment centers. Colorado applicants sometimes drive to Denver or use mail-in options.
- State-layer requirements: Some coastal states add state commercial licensing for charter boats on top of the federal credential. Colorado does not.
- Market size: Colorado's charter market (fishing guides on the Colorado River, lake tours on reservoirs) is smaller than Florida's but real and growing.
Alaska carries the same federal OUPV requirement but has a much larger commercial fishing and charter ecosystem, covered in the six-pack captain license in Alaska guide. California adds state commercial fishing vessel registration on top of the federal credential; see six-pack captain license in California.
The paper path is the same everywhere. Colorado's real difference is the sea-service-building challenge.
What should you do right now if you're starting from zero in Colorado?
Start logging sea service days today, because that's the one requirement you can't rush. Every 4-hour day on the water now is a day you don't have to make up later.
Get a logbook (any bound notebook works) and record the date, vessel name, waters, hours underway, and your role on every trip. When it's time to formalize things, the NMC form CG-719S asks for exactly this information. Detailed personal logs, kept before you file anything, help you reconstruct and verify your service history.
Apply for your TWIC early. The background check takes 4 to 6 weeks and there's nothing you can do to speed it up. Waiting just burns free time.
Work through the other requirements (medical exam, drug test, first aid) in parallel with building sea service. None take long. They're just boxes to check.
Most people over-stress the written exam. The USCG publishes its full question bank modules publicly [7], and many candidates study those directly. If you want structured prep, OUPVPath's $149 OUPV + Bareboat Kit at /start covers the full exam curriculum without a classroom commitment.
For a side-by-side look at how different states handle the early process, the how to start six-pack captain in California and how to start six-pack captain in Arizona guides cover similar landlocked and coastal contrasts.
Frequently asked questions
Do you need a license for six-pack captain in Colorado?
Yes. You need the federal USCG OUPV (Operator of Uninspected Passenger Vessels) license, issued under 46 U.S.C. § 8903. Colorado has no state-issued six-pack captain credential. The federal license applies to any captain carrying up to six passengers for hire on U.S. navigable waters, including Colorado's rivers and reservoirs.
How much does a six-pack captain license cost in Colorado?
Federal fees alone come to about $220 combined: roughly $95 for the NMC credential application and $125.25 for the TWIC from TSA. Add $75 to $150 for the medical exam, $40 to $80 for a drug test, $50 to $100 for first aid/CPR, and $0 to $400 for exam prep. Total out-of-pocket typically runs $385 to $950. Confirm current NMC fees before applying.
How long does it take to get a six-pack captain license in Colorado?
Most Colorado applicants take 3 to 6 months from application to credential, but the real variable is sea service. You need 360 documented days on U.S. waters before you can apply. Building those days during Colorado's May-October boating season can take multiple years from scratch. Once you file a complete application, NMC processing adds weeks to months depending on current volume.
Does Colorado have its own six-pack captain license separate from the federal one?
No. Colorado does not issue a state-level commercial captain credential. The USCG OUPV is the only license you need for six-pack charter operations on Colorado waters. Colorado does require a boating safety education certificate for motorized vessel operators born after January 1, 1949, but that's a recreational safety requirement, not a commercial captain credential.
How many sea service days do you need for an Inland OUPV?
46 C.F.R. § 11.467 requires 360 days of sea service on U.S. waters, with at least 90 of those days occurring within the 3 years before your application. Each day must include at least 4 hours underway. Recreational days count. Documentation must be on USCG form CG-719S or equivalent employer letters.
Can you use Colorado river and lake time to qualify for the OUPV?
Yes, in most cases. Time on navigable U.S. waters in Colorado, including the Colorado River, Gunnison River, Arkansas River, and major reservoirs, qualifies toward your 360-day sea service requirement for an Inland OUPV. The waters must be considered U.S. navigable waters under federal jurisdiction. Keep detailed logs of every trip.
What is a TWIC and do Colorado six-pack applicants need one?
TWIC stands for Transportation Worker Identification Credential, issued by TSA after a background check. The USCG requires it for an OUPV. Apply at a TWIC enrollment center; Colorado has locations in Denver. The fee is currently about $125.25 for most applicants. Plan for 4 to 6 weeks processing time. Apply early, because nothing else in your application moves without it.
What criminal convictions disqualify you from a OUPV in Colorado?
Disqualifying offenses include certain felonies and drug trafficking convictions under 46 U.S.C. § 7703. The TWIC background check under 49 C.F.R. § 1572.103 also screens for crimes including espionage, terrorism, and certain firearms offenses. Some convictions are permanently disqualifying; others have a 7-year lookback window. A waiver process exists for some non-permanent disqualifications. Review the full list before investing time in the application.
Do you need a Near Coastal or Inland OUPV for Colorado waters?
Inland is the right endorsement for Colorado's rivers and reservoirs. Near Coastal covers up to 100 miles offshore and requires documented sea service on coastal waters, which most Colorado residents don't have. If you operate commercially in Colorado exclusively, Inland OUPV is sufficient. If you also guide or charter on ocean waters seasonally, adding Near Coastal later is possible.
How do you document sea service for the OUPV application?
Use USCG form CG-719S, completed and signed by someone who can verify the service (an employer, a vessel owner, or yourself with supporting records). A personal logbook alone isn't sufficient verification, but it's invaluable for reconstructing dates and hours. Start logging every trip now: date, vessel, waters, hours underway, and your role.
What is on the USCG OUPV written exam?
The exam covers Rules of the Road (COLREGS and Inland Rules), chart and compass navigation, weather and tides, vessel safety and fire fighting, first aid, federal regulations, and seamanship. The USCG publishes its full question bank modules publicly through the NMC. Most candidates study the question bank directly. The passing score is 70% on each module.
Can a raft guide or kayak guide in Colorado count that time toward OUPV sea service?
Possibly. Time operating or serving aboard vessels on navigable U.S. waters generally qualifies. The key questions are whether the watercraft qualifies as a vessel under federal law and whether the waters are U.S. navigable waters. Human-powered craft on navigable rivers often do qualify. Confirm with the NMC before relying on that time in your application.
How often do you have to renew a six-pack captain license?
Every 5 years. Renewal requires proof of sea service (one day in the 5-year period at minimum, though more is recommended), a current medical exam on form CG-719K, and a new drug test. The USCG may also require a refresher on certain topics. Renew before expiration; a lapsed credential means starting a new original application process.
Is the six-pack captain license the same in Colorado as in other states?
The federal OUPV requirements are identical in every state; the credential is issued by the USCG regardless of where you live. What varies is the practical path: Colorado's landlocked, seasonal waters make accumulating 360 sea service days slower than in coastal states. Some coastal states also layer additional state commercial licensing on top; Colorado does not.
Sources
- U.S. Code, 46 U.S.C. § 8903 and § 7101, Legal Information Institute (Cornell): Federal statute requiring OUPV license for operators carrying 6 or fewer passengers for hire on uninspected vessels; citizenship and age requirements for merchant mariner credentials
- USCG National Maritime Center, 46 C.F.R. § 11.467 and Part 10 (Inland OUPV sea service and credentialing requirements): Inland OUPV requires 360 days sea service with 90 in the past 3 years; days must be at least 4 hours; medical and examination standards under Part 10
- USCG National Maritime Center, Fees for Merchant Mariner Credentials: NMC application fee for a new original MMC/OUPV is $95 for a 5-year credential; current processing time guidance published on NMC website
- TSA TWIC Program, Enrollment and Fees: TWIC fee is approximately $125.25 for most applicants; enrollment centers exist in Colorado; background check takes 4-6 weeks
- Electronic Code of Federal Regulations, 49 C.F.R. § 1572.103, TWIC Disqualifying Criminal Offenses: List of permanent and interim disqualifying offenses for TWIC eligibility, including certain felonies, terrorism-related crimes, and drug trafficking
- USCG National Maritime Center, Exam Question Bank Modules: USCG publishes its full written exam question bank modules publicly for OUPV and other merchant mariner examinations
- Electronic Code of Federal Regulations, 46 C.F.R. Part 10, Merchant Mariner Credential: OUPV issued under 46 C.F.R. Part 10 and Part 11; credential valid for 5 years; renewal requires sea service, medical exam, and drug test
- U.S. Code, 46 U.S.C. § 7703, Bases for Suspension or Revocation of Merchant Mariner Credentials: Certain criminal convictions disqualify applicants from holding an MMC/OUPV; waiver process exists for some non-permanent disqualifications