Natrona County, WY · Inland River
North Platte River (Grey Reef)
The trophy tailwater below Grey Reef Dam southwest of Casper — one of the highest-density big-trout fisheries in the Rockies. Cold, steady releases grow thick-bodied rainbow and brown trout averaging well over a foot; the Grey Reef, Lusby, and Government Bridge accesses are floated and waded hard year-round.
Live · updated
Top picks today
Rainbow Trout, Brown Trout & Cutthroat Trout — tied at the top (60/100)
3 species tied for best of 3 tracked at North Platte River (Grey Reef).
Atmosphere
Water
Sun & Moon
Species at North Platte River (Grey Reef)
3 species tracked, ranked by today's conditions. The top 3 (tied) are open below — tap any species to expand it, or a chip to focus.
#1 Rainbow Trout Workable day for Rainbow Trout. In season 60/100
About. Oncorhynchus mykiss — The most heavily stocked trout in Maryland. Put-and-take fisheries across the state plus holdover/wild fish in Western MD streams (Savage, Youghiogheny tailwater, Gunpowder). Takes PowerBait, small spinners, and standard dry/nymph patterns.
Prefers. Water 45–68°F (ideal 55°F) · either tide · depth 3–20 ft.
- Daily creel
- 6
Wyoming statewide trout limit: 6/day.
Source: Wyoming non-tidal regulations · verified 2026-06-03.
#1 Brown Trout Workable day for Brown Trout. In season 60/100
About. Salmo trutta — Naturally reproduces in the Gunpowder River tailwater (Loch Raven below Prettyboy) and several Western MD streams; also heavily stocked. Typically more wary than rainbows. Classic mayfly hatches on the Gunpowder — sulphurs, BWOs, caddis. Streamer-eaters after dark.
Prefers. Water 45–68°F (ideal 55°F) · either tide · depth 3–25 ft.
- Daily creel
- 6
Wyoming statewide trout limit: 6/day.
Source: Wyoming non-tidal regulations · verified 2026-06-03.
#1 Cutthroat Trout Workable day for Cutthroat Trout. In season 60/100
About. Oncorhynchus clarkii — The West's native trout, named for the red-orange slash under the jaw. Many subspecies — Yellowstone, Snake River fine-spotted, Bonneville, Colorado River, and the giant Lahontan strain of Pyramid Lake, which routinely tops 10 lb and once produced fish over 40. Feeds hard in cold water, which makes it a year-round target on tailwaters and a marquee winter–spring fishery at Pyramid. Hybridizes readily with stocked rainbows, so wild-cutthroat waters carry strict release rules.
Prefers. Water 39–62°F (ideal 54°F) · either tide · depth 1–25 ft.
- Daily creel
- 6
Wyoming statewide trout limit: 6/day in any combination of waters.
Source: Wyoming non-tidal regulations · verified 2026-06-03.
Location Info
Water Body
Inland River
Access
Pier, shore, and ramp
Jurisdiction
Wyoming non-tidal
Coordinates
Notes
Miracle Mile / Grey Reef: 1 trout/day, all under 20" released. Single-point barbless hooks required below Seminoe (2026); Grey Reef below Ledge Creek closed Apr 1–May 15.
Local reports & rules for North Platte River (Grey Reef): Wyoming Game & Fish fishing & regulations → · trout stocking schedule → · fish-consumption advisories (EPA directory) →
Nearby Access Points
Frequently Asked
Do I need a fishing license to fish at North Platte River (Grey Reef)?
Yes (anglers age 16 and older). To fish at North Platte River (Grey Reef) you need the appropriate state fishing license. See the agency's current rules: the state agency website
What fish are commonly targeted at North Platte River (Grey Reef)?
North Platte River (Grey Reef) is listed on this site for 3 commonly-targeted species: Rainbow Trout, Brown Trout, Cutthroat Trout. Which species is currently in season and which is scoring highest today is shown in the per-species ranking on this page.
When is the best time to fish at North Platte River (Grey Reef)?
It depends more on the species and the day's conditions than on a fixed "best hour." Water temperature, weather, and — at tidal locations — the stage of the tide drive activity most. The per-species ranking on this page scores every target species at North Platte River (Grey Reef) against today's live conditions, so the fish near the top are your best bets right now; check back as conditions change through the day.
What kind of access does North Platte River (Grey Reef) have?
North Platte River (Grey Reef) has multiple access types — pier, shoreline, and at least one public boat ramp. Miracle Mile / Grey Reef: 1 trout/day, all under 20" released. Single-point barbless hooks required below Seminoe (2026); Grey Reef below Ledge Creek closed Apr 1–May 15.
Which state's fishing regulations apply at North Platte River (Grey Reef)?
state agency regulations apply at North Platte River (Grey Reef). Size limits, creel limits, and seasonal closures are listed per species on each species page. Always confirm against the agency source linked from each regulation block — emergency closures can take effect mid-season.
Is North Platte River (Grey Reef) tidal water?
No. North Platte River (Grey Reef) is non-tidal — water level varies with rainfall, seasonal flow, and (where applicable) upstream dam releases rather than tidal exchange.