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Grey Reef Fishing Report Provided By North Platte River Fly Shop

Grey Reef fishing reports and video reports on the North Platte River is a free service provided by our Casper, Wyoming based fly shop fishing guides and customers. These Grey Reef fishing reports will be updated as often as needed and we will always change the report if any sudden changes should occur. However please understand that sudden storms can often change conditions overnight in and around Grey Reef before we can change the report. We welcome any fishing reports that you would like to provide on Grey Reef by giving the fly shop a call or email. 

grey reef fishing report miracle mile fishing report fremont canyon fishing report  

 Grey Reef Fishing Reports

  • Grey Reef Conditions: Clarity is good

Grey Reef - Hot Flies

BWO's, Midges, Scuds, Egg Patterns, Red rock worms (annelids), San Juan worms, Hot Head Leeches, Squirrel Leeches, Halo midges. Swinging and dead drifting both the Brown Bite Me Buggers and Vanilla Buggers.  


4-24-17 Grey Reef Guide Fishing Report

North Platte River Fly Fishing Report from mark boname on Vimeo.

4-19-17 The Blue Wind Olive hatch is on, time to switch from midge patterns to our Split Foam Backs and RS2's. You also should carry a few size 18 parachute adams along with you as well for dry fly fishing.

4-6-17 Flows are now at 2000cfs

3/21/17 Gray Reef guide video report

North Platte River Fly Fishing Report from mark boname on Vimeo.

2-27-17 Flushing Flow Schedule

North Platte River flushing flow to run for 10 days                      

CASPER – The Wyoming Game and Fish Department cautions sportsmen to be aware of sizeable increases in water flows in the North Platte River for 10 days beginning March 6 as part of a flushing flow project. Game and Fish has requested the flushing flow in order to maintain fish spawning habitats and to increase production of invertebrates that fish depend on for food. The Bureau of Reclamation will begin releasing additional water from Gray Reef Reservoir in the early morning hours beginning Monday, March 6. Flows will increase from approximately 500 cubic feet per second (cfs) to 4,000 cfs and will then gradually decrease back to 500 cfs each day, with the maximum flow occurring between 3-7 a.m.   Flows from Gray Reef Dam will return to 500 cfs at 10 a.m. each day.  The schedule will be repeated through March 15. The flows below Gray Reef Dam will then be stabilized at approximately 500 cfs following completion of the ten day cycle.  This schedule may be modified due to river ice. “Data show these flows are important to trout spawning and to the numbers of trout in the river,” said Matt Hahn, fisheries supervisor for the Casper region. In the past, the trout population had fallen to less than 400 trout per mile, even with stocking. Annual flushing flows began in 1995, and now the trout population averages over 3,500 per mile and annual stocking has been eliminated upstream of Casper.    The Game and Fish Department advises sportsmen and recreationists to be aware of the potential dangers related to flushing flows. Because the flush will span the weekend, there is potential for more people to be wading or floating the river. Those using the river during the flushing flow should consider the fluctuating water levels and be aware that areas that can be waded effectively at 500 cfs may not be safe at 4,000 cfs Flushing flows are normally scheduled for completion in March to maximize benefits for spawning rainbow trout. 

2-13-17 Grey Reef is free of ice and is floatable in a boat. Still some self ice along banks in some areas.

Last Update til Spring - Winter flies Midges, Rock Worms, Annelids, Scuds, Glo Bugs, Leeches - Have a great winter!

Special Christmas North Platte River Fly Fishing Report from mark boname on Vimeo.

December 1st North Platte River Fly Fishing Report from mark boname on Vimeo.

Road at Lusby Public Access Area to close for 24 hours due to construction 

CASPER - The Wyoming Game and Fish Department will complete construction on Dec. 1 and Dec. 2 to improve the access road to the Lusby Public Access Area, which is southwest of Casper along the North Platte River.  This construction will require the road be closed for 24 hours while the magnesium chloride is sprayed on the road base.  To insure the magnesium chloride treatment is successful, the road will be closed from 12:00 pm Dec. 1 until 12:00pm December 2, weather dependent. 

“We apologize for the inconvenience this will cause anglers.  The upgrade is an investment for the benefit of the sporting public and a 24 hour closure to traffic will insure the success of this investment.  If everyone can have patience with us, the road should be a great improvement on its current condition,” says Matt Pollock, Casper Region habitat and access supervisor for Game and Fish. 

Game and Fish received Wallop-Breaux funds to complete the construction.  For more information please contact the Game and Fish Casper Regional Office at (307) 473-3405.

Last Update til Spring - Winter flies Midges, Rock Worms, Annelids, Scuds, Glo Bugs, Leeches - Have a great winter!

10-26-17 River is closed to fishing from Morad Park to Wyo. Blvd Bridge in Mills due to heavy equipemnt in the river.

9-7-16 Grey Reef guide video report

September 7th Grey Reef Fly Fishing Report from mark boname on Vimeo.

7-30-16 Gray Reef fishing video report with Wyoming Fly Fishing guides.

July 30th Grey Reef Fly Fishing Report from mark boname on Vimeo.

6-27-16 Grey Reef fishing report with Wyoming Fly Fishing Guide Service

June 27th Grey Reef Fly Fishing Report from mark boname on Vimeo.

6-24-16 Flows reduced back down to 5000cfs

6-21-16 PMD's and Yellow Sallies along with red annelids, san juans and leeches are producing the best results.

5-31-16 Grey Reef Guide Video Fishing Report

May 31, 2016 North Platte River Fishing Report from mark boname on Vimeo.

5-24-16 Water levels in Grey Reef section continue to rise and now at 4000 cfs. Clarity good from Grey Reef to Lusby. Leeches, san juan worms, annelids, baetis and midges best flies.

5-11-16 Bureau of Reclamation is updating their operational plan for the system and they expect above average flows in the North Platte River in the Mile and below Gray Reef this season.  Average summer flow is 2,200 - 3,000 cfs and current estimates suggest higher.  Actual flows will depend on the amount of additional precipitation and air temperatures that will control the amount and timing of runoff. Flow will be increased to 4,000 cfs in the Mile today and to 3,000 cfs below Gray Reef over the next week. 

5-2-16 Flows being raised to spring levels this week 100 to 200 cfs per night.

4-25-16 Grey Reef Fishing Report by the Wyoming Fly Fishing Guides

April 25th North Platte River Fishing Report from mark boname on Vimeo.

4-14-16 Grey Reef Fishing Report Video

4-5-16 North Platte River Guide Fishing Report for Grey Reef, Miracle Mile and Fremont Canyon

3-16-16 Grey Reef Guide Round Table fishing report

Grey Reef Fishing Report from mark boname on Vimeo.

3-9-16 Gray Reef Guide Round Table video report

Grey Reef Fishing Report from mark boname on Vimeo.


3-3-16 A must see Grey Reef fishing video fishing report.




Fluctuation of North Platte River Flow Downstream of Gray Reef Dam

MILLS, Wyo. – The Bureau of Reclamation, in response to a request from the Wyoming Game and Fish Department, has scheduled a series of fluctuating flows in the North Platte River downstream of Gray Reef Dam.
The purpose of the fluctuations is to improve trout reproduction in the river. This spring, the Wyoming Game & Fish has requested flows for ten consecutive days. The Wyoming Game & Fish will collect data before, during, and after the flushing flow in order to evaluate its effectiveness.
On March 7, flows in the river below Gray Reef Dam will fluctuate from 500 cfs to 4000 cfs according to the following schedule:
00:01 to 01:00 a.m. 500
01:00 to 03:00 a.m. 2000
03:00 to 07:00 a.m. 4000
07:00 to 08:00 a.m. 3000
08:00 to 09:00 a.m. 2000
09:00 to 10:00 a.m. 1000
10:00 to midnight 500

This schedule will be repeated daily on March 8 through March 16. After completing the flushing flow on March 16, the flows below Gray Reef Dam will return to 500 cfs. The schedule may be modified depending on river ice conditions.

The flushing flows are expected to clean the spawning gravels of fine sediment which has accumulated over the winter. The fluctuations in the river flow will be achieved without loss of power generation and the water released from Alcova Reservoir will be restored downstream in Glendo Reservoir.

The public is urged to use caution during this period of rapid fluctuation of flows below Gray Reef Dam.

Grey Reef Fishing Report



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