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Grey Reef Fishing Report Provided By North Platte River Fly Shop

Grey Reef fishing 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

Tricos, BWO's, Psueodo's, Caddis, Midges, Scuds, 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.  


NOAA provides river flow data and forecasts  

 Buy A Wyoming Fishing License:


Grey Reef Guide Fishing Report

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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