Crazyrainbow Fly Fishing, Casper Wyoming

Grey Reef

Crazy Rainbow Fly Fishing
Grey Reef Fly Fishing

Grey Reef Fly Fishing
Grey Reef Fly Fishing
GREY REEF FLY FISHING | Wyoming's Premiere Fly Fishing Outfitter
Wyoming Fly Fishing

The Grey Reef is where western fly fishing comes to life. If you’re picturing the classic western fly fishing experience and open skies from horizon to horizon, as well as big, wild trout, and plenty of solitude, then the Grey Reef won’t disappoint. Tailwaters make for the ideal trout habitat. The entire North Platte, from Grey Reef to 70 miles downstream, is first and foremost a trout fishery. The Reef is managed with flushing flows and fishing restrictions in order to produce a thriving trout population, as well as some of the best trout fishing in the lower US.


Private Access

With our private land holding and lodging adjacent to the Grey Reef, you will enjoy exceptional access to the river as well as freedom to wade fish whenever you like.  You will most likely be the first fisherman out on the water. Rainbows make up over 90% of the fish at the Reef. 

Crazy Rainbow Guides the Grey Reef Tail Waters known for Great Trout Habitat

Grey Reef Fly Fishing

Grey Reef Tail Waters enjoy large fish numbers, consistent water temps, flows and the Chance to Catch a Fish of A lifetime

Grey Reef Fly Fishing
Grey Reef Fly Fishing
Grey Reef Fly Fishing
Grey Reef History

The Grey Reef in specific is held very close to the hearts of many Wyoming natives as it is rich in history and is a symbolic staple that speaks towards the resilience of Casper and those who inhabit it. Some may be surprised to know that Casper, Wyoming is in fact a bucket list location and heavily sought after fly fishing destination for anglers around the country.  


The Grey Reef comes from very humble beginnings. In an area where the extraction industry is culturally embedded in the overall history, the North Platte was once seen as a dumping ground for industrial waste. In fact, in 1958 the North Platte was deemed the most polluted river system in the nation. Despite a less than savory outlook at the viability of the North Platte being able to recover,  Casper locals held unwavering hope that the fishery could be rejuvenated into what it was intended to be.


Wyomingites Take Action

In the way of Wyomingites, hope turned into action. Credit must be directly given to the Two-Fly Organization for teaming up with the City of Casper to facilitate a complete study of the river system. This study then led to a plan to restore the Grey Reef as well as the North Platte in general as it flows through Casper. 


After the Platte River Revival Committee came into the picture, the 13 plus mile restoration project catapulted this drainage system into what it is today: a Blue Ribbon fishery. Known predominantly for its nymph fishing, the famous Grey Reef Section of the North Platte is a tailwater that runs east from Grey Reef Dam towards the city of Casper. The Grey Reef is home to a healthy trout population that consists of about 90% Rainbows and 10% Browns and Cutthroat with an average trout size of 16 to 18 inches. Not only does floating the Grey Reef give you access to some of the heartiest trout in the west, it also gives you a front row seat to the wildlife and rugged terrain it inhabits that makes the West so special.

Crazy Rainbow Fishing Benefits

Some notable benefits of fishing with Ugly Bug Fly Shop and Crazy Rainbow Fly Fishing compared to other outfitters is our 9 miles of private river access, 8 private boat ramps, lunch huts, and access to restrooms. Therefore, our land allows you to enjoy the wild west while still reaping some benefits of civilization. Though fishing is most productive from the drift boat, our private land also allows our anglers to step out of the boat and into the river for some wade fishing opportunities if desired. 

Seasonal Fly Fishing Rates For the Grey Reef

Crazy Rainbow Fly Fishing Rates

Carp Fly Fishing

April thru September - $625/Boat - Full Day

Guided Fly Fishing Trips
(April - October)

Full-day Guided Fly Fishing Trip

Half-day Guided Fly Fishing Trip

Full-day Instructional Fly Fishing

Full Day Miracle Mile Fly Fishing Trip

Full Day Big Horn Fly Fishing Trip






  • Lunches are included on full day guided trips only. All terminal tackle and fly fishing gear is included in the price package.
  • Want some additional instruction and training for fly fishing, choose our “Fly Fishing Instruction Trip”. Get some great advice from our professional fly fishing guides.
  • Book your Grey Reef Tail Waters River fly fishing trip today. A 50% deposit is required to reserve your dates. Four weeks prior notice for cancellations is required for a full refund. Please view our full Cancellation Policy here.
Off-season rates
(November - March)

Add Lodging To Trip

Full-day Guided Fly Fishing Trip

Full-day Instructional Fly Fishing

Full Day Miracle Mile Fly Fishing Trip




Add lodging accommodations to your fly fishing guided trip from Crazy Rainbow Lodge and Crazy Rainbow River Cabin.

CRUSHING IT!! I have had the pleasure of fishing with the Ugly Bug for almost 20 years. This year was my absolute favorite! I was able to finally take my son for his first experience in a Blue Ribbon fishery
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Ian Ferguson

My family and I have been customers of Crazy Rainbow for years. It would take us some time to try and calculate how many fish we have caught with them over the years.
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Kris Kumlien

I've fished with Blake and his crew at the Ugly Bug several times over the years, taking my kids and wife and fishing solo and the experience is always top notch.
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Steve Dunbar

No need to go anywhere else! Fished for two days with two boats, Mike, Tanner and Tyler worked every minute to put us on fish and have a good time.
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Christie D.

Exceptional service and fly fishing experience! My husband and I floated the Grey Reef with Dustin and boated so many fish that I lost count by lunch!
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Myron M

BEYOND EXPECTATIONS! I spent a week in July fishing with Ugly Bug guides Justin, Troy, and Addie (also at the shop) on the North Platte catching rainbows, cutthroats, and browns. I have fly fished most of my adult years, and this was by far the best trip of my life.
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Suzty Q

THE TROUT, THE RIVER, AND LAURIE STROOPE My husband and I booked a trip with Ugly Bug for our 31st anniversary and were thrilled (mostly my husband) to go on this once in a lifetime excursion with their female guide, Addie Dees, on the Platte River.
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D Lynn

UGLY BUGS AND CRAZY LADIES 2021 This is my 3rd outing with the Crazy Ladies and it is so worth it.
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Stanley N

FANTASTIC.... AS ALWAYS!! There are not enough superlatives to describe the benefits that Blake Jackson brings to the North Platte fishing experience:
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Ken Pargett

PROFESSIONALISM OF THE HIGHEST ORDER The Ugly Bug in Casper, WY assigned Dustin White as our guide. The Ugly Bug asked me for my cell number and email address and within 24 hours Dustin texted and called to discuss my goals and expectations.
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UBCL 101 - Sportsman Fly Fishing

Perfect For Beginner Fly Fisher Women

Destination Travels

Crazy Rainbow Fishing Around The World

Come travel the world with Crazy Rainbow Fly Fishing Guides. We travel to exotic places around the world for exciting fishing trips. Schedule early Crazy Rainbow Destination Travels are limited  opportunities. Each trip is only offered once per year to every other year.

The River of Dreams

Travel the Magic Waters Patagonia, our main and first fly fishing operation in Patagonia, we are always looking for new adventures, and always looking to find new waters for our friends and clients. For long time we were looking at Blanco River. We were wondering about the fishing and mainly about how to set up an operation in this pristine and untouched 30 miles of river. So, between Eduardo Barrueto and Andi Manstein we decided to go forward and start setting up this fantastic dream, that we called The River of Dreams.

Caribbean Fishing

Travel to the Grand Slam Fishing Lodge is like an exclusive resort that happens to be run by fishermen, for fishermen (and their non-fishing companions). Situated on a narrow, palm tree-studded strip of sand, the lodge faces the Caribbean on one side with the lagoon lapping on the other side. So you get great sea views plus easy access to Ascension Bay with our lagoon dock.
Crazy Rainbow Destination Travels
Magic Waters Patagonia

Tsimane Fishing

Travel to the Agua Negra Camp is a remote yet luxurious tent camp/lodge perched on a bluff overlooking the Secure River. Roughly 100 yards away is the small native village of Agua Negra, which makes this camp by far the most culturally rich of the Tsimane experiences. Here anglers will enjoy very comfortable double occupancy safari tents with attached baths as well as the comfort of the main lodge building where drinks and meals are served. The fishing will be done on the main Secure as well as on the Agua Negra River. The Agua Negra is smaller and offers not only big dorado but the region’s most forgiving terrain as well as the greatest diversity of species including large pacu, pira pita and the elusive striped catfish known as surubi.

Schedule Crazy Rainbow Destination travels today to experience fishing of a lifetime.