The Clark Fork River Trout Derby runs each summer and welcomes anglers of all skill levels to fish a stretch of river near Missoula
The Clark Fork River Trout Derby is an annual summer fishing event held on the Clark Fork River near Missoula, Montana. The derby typically takes place over a weekend in July, though the exact dates shift year to year. Anglers fish a designated section of the river during set hours, and prizes go to the largest fish caught in different categories — usually including separate divisions for adults and youth.
The event is organized by local fishing groups and the Missoula Parks and Recreation Department. It draws both longtime river anglers and people new to fly fishing who want to fish alongside others. The derby is free to enter, and you do not need a guide or special equipment beyond what you would bring to fish the Clark Fork on any other day.
Key Takeaways
- The Clark Fork River Trout Derby is a free, one-day or weekend event held each July near Missoula where anglers compete for prizes based on fish size.
- You must have a valid Montana fishing license and follow all state fishing regulations, including catch-and-release rules if they apply to the derby section.
- The derby typically runs during daylight hours on a set schedule, and you fish from the bank or by wading in the designated stretch of river.
- Registration usually happens on the morning of the event at a central location near the river, and entry is first-come, first-served.
- Prizes are awarded for the largest fish in each category, with separate divisions for adults and young anglers.
When the Derby Happens and How to Register
The Clark Fork River Trout Derby takes place in mid-July most years, though you should check the current year's date with Missoula Parks and Recreation or the local fishing club running the event. The derby typically runs from early morning — often around 7 or 8 a.m. — through early afternoon, giving anglers a window of four to six hours to fish.
Registration happens on the morning of the event at a designated spot near the river, usually a parking area or boat launch. You show up with your Montana fishing license, pay no entry fee, and receive a competitor number. The organizers brief all anglers on the rules, the exact boundaries of the fishing section, and how fish will be weighed and measured. Spots fill on a first-come, first-served basis, though the derby rarely reaches capacity.
What You Need to Bring and Know About Licenses
You must carry a valid Montana fishing license — either a daily license or an annual resident or nonresident license. You can buy a license online through the Montana Fish, Wildlife and Parks website, at sporting goods stores, or at some gas stations. A daily license costs less than a full-day guide trip and covers you for any fishing you do that day.
Bring your own rod, reel, and tackle. Most anglers use fly rods on the Clark Fork, but the derby does not require it — spinning gear works fine. Wear waders or clothes you do not mind getting wet, bring polarized sunglasses to spot fish, and pack water and snacks. The July sun is strong in Montana, so sunscreen and a hat matter. If you do not own waders, you can rent them from fly shops in Missoula for the day.
The Clark Fork holds both cutthroat and rainbow trout, and the river has sections where catch-and-release is required by state law. The derby rules will specify whether you keep fish or release them — most modern derbies use catch-and-release with measurement and photography for scoring. Ask the organizers at registration which method applies to that year's event.
The Derby Section of River and Where to Fish
The derby uses a specific stretch of the Clark Fork, usually a mile or two long, that is accessible from the bank and by wading. The organizers mark the upstream and downstream boundaries clearly so all anglers know where they can and cannot fish. You can fish from the bank, wade into the shallows, or move along the river within the designated section.
The Clark Fork in this area holds good numbers of trout, especially in summer. Deeper pools, undercut banks, and areas with current breaks hold fish. If you have never fished this section before, arriving early gives you time to walk the banks and spot likely water before the derby starts. Local fly shops in Missoula can also tell you what the river looked like recently and where fish have been feeding.
How Scoring Works and What Prizes Look Like
Most years, the derby awards prizes for the largest fish caught in each category — typically one prize for the biggest adult fish and one for the biggest youth fish. Some derbies add categories for different species or for the most fish caught. The organizers weigh and measure fish at a central weigh station, usually near where you registered.
Prizes vary by year but often include gift certificates to local fly shops, fishing gear, or entries into other regional fishing events. The focus is on the fishing itself and the community of anglers rather than on large cash prizes. Winners are announced at the end of the day, and many derbies hold a brief gathering where anglers share stories about what they caught and where.
Rules You Need to Follow During the Derby
All Montana fishing regulations apply during the derby. That means respecting any catch-and-release sections, following size limits if they exist, and using only legal tackle and methods. The derby organizers will review these rules at registration, and they are also printed in the Montana fishing regulations booklet that comes with your license.
You must stay within the marked boundaries of the derby section. You cannot fish outside those limits, even if you see fish there. The event runs on a set schedule — once time is called, you stop fishing. Any fish you catch after the official end time does not count. Treat other anglers with respect, give people room to fish, and do not crowd productive water.
Getting Ready: What Local Fly Shops Can Tell You
Missoula has several fly shops within a few miles of the Clark Fork, and the staff there know the river well. Stop in a day or two before the derby to ask what insects are hatching, what flies are working, and what the water level and temperature are like. They can also tell you which section of the derby stretch tends to hold the most fish and what time of day is usually best.
If you do not own fly gear and want to try fly fishing for the first time at the derby, some shops offer beginner lessons or can set you up with a rented outfit and a quick tutorial. The derby is a welcoming event for newcomers, and many experienced anglers are happy to share tips if you ask.
Frequently Asked Questions
Do I need to be an experienced angler to fish the derby?
No. The derby welcomes anglers of all skill levels, and many people fish it for the first time. You do need a Montana fishing license and the ability to wade or fish from the bank safely. If you are new to the river, arrive early to scout the water and ask other anglers or the organizers for advice on where to start.
Can I fish with my kids?
Yes. The derby has a youth category with separate prizes, and many families fish together. Kids under 16 may not need a license in Montana depending on their age — check the current regulations when you buy yours. The event is designed to be inclusive and fun for all ages.
What if I have never fly fished before?
You can fish the derby with a spinning rod and reel instead. Many anglers use conventional tackle on the Clark Fork. If you want to try fly fishing, rent gear from a Missoula fly shop and ask for a quick lesson. The derby is a good low-pressure way to practice.
What happens if the weather is bad?
The derby usually runs rain or shine unless conditions are unsafe — high water, lightning, or extreme heat. Check with the organizers the day before if weather looks questionable. Most years the event goes forward as planned.
Where do I find the exact date and registration details for this year?
Contact Missoula Parks and Recreation or search for "Clark Fork River Trout Derby" and the current year. Local fly shops and the Montana Fish, Wildlife and Parks website also post derby information. Registration details and any changes to the schedule are usually announced a few weeks before the event.