Crazyrainbow Fly Fishing, Casper Wyoming

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Crazy Rainbow Fishing Report


Crazy Rainbow Fishing Report

Crazy Rainbow Fishing Report 5/20/24

Grey Reef: 5/20/24

Flows-  1,509  CFS

Fishing Report  ~ 

Fishing on the Reef has been very productive this last few weeks. With rising temperatures hatches are occuring more often so keep an eye out. We have been seeing a ton of activity when it comes to BWO’s. For patterns using olive and BWO coloration flies have been working great. Focus on using Size 18 BWO Mayhem’s, BWO CDC case emergers, BWO bat wings, Black Mayhem’s, darker black and olive baetis patterns. Leeches brown, natural, and black have been working great as well as rock worms in the smaller size ranges.


Miracle Mile: 5/20/24

Flows-  2,635 CFS

Fishing Report ~

Fishing on the mile has been fair and doing good! If you are looking for more quality over quantity as far as fish go the mile is your spot. Very similar patterns and bugs as the Reef are doing well on the mile yellow sallys are also starting to pop up. With heavy rain and weather the roads are likely pretty muddy keep an eye out and only head out with a vehicle suitable for those conditions.


Fremont Canyon: 5/20/24

Flows- 75 CFS

Fishing Report ~

We are hearing positive reports in the Canyon. Flows are at operational levels and fair water clarity! Tan/black leeches have been most productive on the nymph rig. Rock worms are also working well and an assortment of midge patterns. Stick with your BWO color patterns when it comes to bugs. If you are debating on what parts to fish the faster sections of water seem to be fishing the best.


The Big Horn: 5/20/24

Flows- 2,195 CFS

Fishing Report ~

The Big Horn has been fishing well with cleaner water conditions.Streamers are doing well so look at using white/flashy or olive/flashy streamers such as the Rusty Trombone/Articulated Goldie, Laser Legal/Barely Legal patterns. For nymphs look at HH and regular sowbugs, duracell’s, and BWO patterns and colors.

Check out flows for all Wyoming rivers here: Wyoming River Flows (

More great reads!

Top 5 Streamers for the North Platte River      

Fishing Tips for Success 

Book your trip with us here: Crazy Rainbow Guided Trip Reservations or call the shop at (307) 232-882

Ugly Bug Fly Shop and Crazy Rainbow Fly Fishing is honored to be your go to fly shop and guide service in Casper, Wyoming. We offer guided fly fishing trips, lodging accommodations, educational courses, as well as the best advice in the west. Stop in the store or find us online! We offer free shipping on all online orders over $50. New Crazy Rainbow Fishing Reports every Monday! We are open Monday through Friday 9:00am-5:30am and Saturday 8:00am-4:30pm 

Got some fish pics you would like to share?  Shoot them to us in an email to


The Ugly Bug Crew

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Blake Jackson

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