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Colorado's Hatches

There are a number of different insects that hatch throughout the year in Colorado. Depending on the weather and the season, hatches vary and will greatly affect your catches. Being prepared by checking Colorado hatch charts, is the best way to make catches while out on the river.

  • Stoneflies

  • Stoneflies live in cold, and unpolluted rivers. They are a common hatch in Colorado that large trout like, so they are perfect for fly fishers looking for a big catch. They range in size from 4-22, and most commonly emerge in the morning.

  • Caddis

  • Caddis will hatch year around in Colorado and are most commonly used for catches on the Eagle River in the Vail Valley. Caddis can range in size from 10-18 and most commonly emerge in the afternoon and evening.

  • Midges

  • Most midges will hatch through the spring summer and fall. Midges range in size from 18-28 and can emerge all day, but most commonly in the morning or during the warmest part of the day.


Colorado Fly Fishing gives anglers opportunity to catch over 30 different species of fish. There are many different kind of trout that can be caught in the rivers, lakes, and reservoirs in Colorado. Other popular species of fish include slamon, bass and pike.

Cutthroat Trout

Cutthroat trout are the only native trout to Colorado. They can be found in cold-water tributaries and are most commonly found in the Rocky Mountains.

Kokanee Salmon

Kokanee Salmon live in reservoirs at higher elevation. They are commonly caught early each spring after they have been released from hatcheries.

Largemouth Bass

Largemass bass were introduced to Colorado in 1878, and they are mainly stocked in the front range waters. They are a warm water fish that can e found in lakes.

Rainbow Trout

Rainbow trout are native to the pacific coast but they have become a very popular fish in Colorado. They are a cold water fish and are commonly found in lakes and rivers.


You can fly fish in Colorado all year around. However, different times of the year provide different opportunities due to popular hatches to prevalent species in each river.


  • Spring is a great time to fish in the Eagle River and the Colorado River. The warmer temperatures are not only more comfortable for the angler but the fish tend to be more active in the springtime.


  • Summer is the most popular time to fly fish in Colorado. Whether you are an expert or a novice there are plenty of catches to be had in the Rockies throughout the summer.

  • FALL

  • This is a great time to catch large trout on the Colorado River. Fall is the perfect time to catch the beautiful fall colors and enjoy big catches.