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St Vrain Creek Fishing Information
Middle Fork - near Lyons, CO
The St. Vrain is a smaller creek that runs into the front range town of Lyons. Most of the fishable water for trout starts in Lyons and then heads upstream. The water is mixed private and public so access takes some exploring, but there is ample places to fish if you take a look at the map. You can catch brook trout in the upper reaches as well as cutthroat. As the water moves downstream you’ll begin to see browns and rainbows take dominance. This is a river where you never know what you’ll get as you fish. In addition, there are some designated wild trout waters on the North Fork that provide anglers with an opportunity to catch exclusively wild trout. Extra care on landing and releasing these fish is important. Barbless lures and catch and release quickly and safely. Refer to our catch and release resources below.
The St. Vrain is an excellent river that is close and will allow you to catch some small fish that are in some of the more beautiful locations in the front range.
North Fork Section
The North fork is partially in Rocky Mountain National Park and accessible in the Wild Basin area. This area is fun but requires a pass for RMNP. Down below you can access the wild trout waters below hwy 7 with a hike. You can also fish the lesser known tailwater called button rock on the north fork that can be fished year round if the flows are managed. Flows can get low on this area and the fish count is lower than desired but still a fun place to hike and fish when you get the time. The North fork is also accessible from off hwy 36 as you get out of lyons in a few places, though it is limited.
Middle Fork Section
The Middle fork and south fork come together along hwy 7 and from the confluence downstream into the town of lyons there is decent fishing and access. You can also access this from the peak to peak hwy for a while as well. There are a few pull offs and the fishing is tight quartered with more willows and branches to find than beginners will appreciate. A good place for solitude nearby with little pressure. The town section in Lyons is loaded with fish and fun, but you have to compete with the noise of a town which some don’t like. I do best here in the late evening after I’ve had a few beers at the local oskar blues restaraunt and pub!
South Fork Section
The South Fork is accessible off the peak to peak hwy and the brainard lake road. The fish are small but fun in this section and there are some good trailheads to access some of the water and some high mountain lakes all in the same day making it a fun adventure.
Fish: Few Small-Sized Fish
Best Techniques: Dries & Nymphs
Best Seasons: Spring - Fall
River Type: Small Freestone
Fish Types: Rainbow Trout, Cutbow Trout, Brown Trout, Cutthroat Trout
Dog Friendly: Yes but Leashed
Located in the South Platte River Basin near Lyons, CO
Fishable Seasons & Current Weather
The best seasons to fish this river are Spring - Fall. See the current weather reports for the next 5-6 days listed below for the nearest city.
wind: 7mph NNE
H 71 • L 71
Weather from OpenWeatherMap
Knowing what flies to use is only have the battle. You have to know when the insects are active on the water and when it's likely the trout are feeding on them. Refer to our hatch charts below to understand when the insect categories and some of the possible hatches on the river.
Midges hatch year round, but their importance is from September through winter into April. During the warmer months, the trout often focus on larger insects as they are more active on the water like mayflies, caddis and stoneflies.
Aside from Blue wing olives, mayflies are active most commonly from May to August in Colorado. There are many different mayfly hatches found on most rivers and the most common are listed below.
Blue Wing Olive: September throut winter to April
Pale Morning Dun: June to Mid September
Colors: White, Yellow
Sizes: #14 - #20
Caddis hatch starting early in May and continue to the end of October.
Colors: Olive, Green, Yellow, Tan, Orange, Brown and Black.
Sizes: #10 - #20
We have some great stonefly hatches in Colorado and while not all rivers carry all species of salmonflies, you can often fish stonefly adult patterns with confidence from May to September. Start off in bigger sizes and get smaller till September hits (size 8 - 16)
Golden Stone: June to August
Colors: Yellow, Tan
Sizes: #8 - #14
Yellow Sally Stonefly: Mid June to August
Colors: Yellow, Tan
Sizes: #12 - #18
Terrestrials don't hatch since they are out of the water, but they can have importance starting in Mid April and ending in September.
These are the the top flies we sell for this river. Use the hatch chart above to know what flies you will want to have in your fly box during your adventure on the river and then select the flies here 30 days before your trip to get them at a great price. All of our flies are hand tied to each order to ensure quality and to keep our prices low for you.
Click on a fly below to select a size and color for purchase.
If you need an easier solution than selecting each fly and size, try out our top fly assortments for this river that will put all the flies you need in a single order for this river. We've already selected the flies we use in our fly box for this river including the sizes and colors and put them in these assortments so you can fish with the confidence that you have the right flies in your box.
Click on any of the pictures to see what flies, colors and sizes we recommend in each assortment.
Use these epic resources to get ready for your adventure. Whether you're planning your trip, learning your insects, improving your fishing with expert tips or getting detailed resources from the USGS streamflows or DoW, we got you covered to help you find the river and find the success you want.