Gibbon River Fishing Forecast
Fly fishers plan Wyoming trips on the Gibbon River because it stacks credible wading access, recognizable insect cycles, and trout that respond when flows align. Expect classic freestone rhythm: push during stable or dropping flows after fronts, then back off when the river spikes and color returns in 24–48 hours. River-specific intel: The Gibbon River flows through Yellowstone, offering small stream fishing for brook, rainbow, and brown trout in beautiful meadows and canyon. USGS gauge 06037100 tracks live flow and temperature for planning wade or float days.
Below the dam, the Gibbon River is running at 73 CFS through 56°F water — 6/10 today. Top pick: a Stimulator.
Open Sat of Mem Day wknd — First Sun in Nov
YNP fishing permit required. Some sections may have additional closures
Forecast and on-page guide updated September 9, 2026 (UTC). Open the app for hourly conditions.
Today's Fishing Conditions
Fair
Updated 7:28 PM
56°F
73 CFS
5 AM - 7 AM
Stimulator
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Quick Facts
Brown Trout, Rainbow Trout, Brook Trout, Westslope Cutthroat Trout, and Arctic Grayling
freestone
48°F - 58°F
What Makes the Gibbon River Unique?
Signature hatch or window
BWO (Mayfly) is a headline hatch to watch in September. Peak activity often tracks 44–58°F water temps.
Distinctive access
Norris: Upper river access near Norris Geyser Basin.
Rules anglers miss
Park fishing permit required.
September Fishing Tactics
Primary Targets
Recommended Tactics
Excellent fall fishing. Browns aggressive.
September Hatches
BWO
Mayfly
Early season and fall BWO fishing. Meadow sections productive.
Year-Round Fishing Guide
| Month | Water Temp | Tactics |
|---|---|---|
| January | 32-38°F | Deep nymphing, Midges, Streamers |
| February | 33-40°F | Midges, Small nymphs, Deep pools |
| March | 36-45°F | BWO dries, Streamers, Early stonefly nymphs |
| April | 40-50°F | Skwala dries, BWO patterns, Streamers |
| May | 45-55°F | Mother's Day Caddis, Nymphing, Streamers |
| June | 50-60°F | Salmonfly dries, Golden Stones, PMDs |
| July | 55-68°F | PMDs, Hoppers, Caddis, Attractor dries |
| August | 55-70°F | Hoppers, Tricos, PMDs, Terrestrials |
| September(Now) | 48-58°F | BWOs, Streamers, Hoppers |
| October | 40-50°F | Streamers, BWOs, Egg patterns |
| November | 35-42°F | Streamers, Deep nymphs, Egg patterns |
| December | 32-38°F | Deep nymphs, Midges, Slow presentations |
Spawning Seasons
Please respect spawning fish and their redds. Avoid fishing over actively spawning trout.
Brown Trout
Spawn months: October, November
Night spawning common. Males become very dark with pronounced kype during spawn.
Rainbow Trout
Spawn months: March, April
Resident rainbow trout spawn in smaller tributaries and tend to build smaller redds than steelhead.
Brook Trout
Spawn months: September, October
Males develop vibrant red bellies and white-edged fins during spawning. Early fall spawners.
Cutthroat Trout
Spawn months: May, June, July
Spring spawners. Timing varies by subspecies and elevation - coastal populations spawn earlier (Feb-Mar), inland populations later (May-July). Eggs develop for 6-7 weeks before hatching.
Westslope Cutthroat
Spawn months: June, July
Native to northern Rocky Mountain streams. Spawn later than other cutthroat due to high-elevation habitat and colder water. Particularly sensitive to hybridization with rainbow trout.
Access Points & Parking for Gibbon River
Norris
Upper river access near Norris Geyser Basin.
Gibbon Meadows
Meadow fishing access.
Gibbon Falls
Below falls access.
Madison Junction
Confluence with Firehole.
How to Fish Gibbon River: Tips & Tactics
The Gibbon River flows through Yellowstone, offering small stream fishing for brook, rainbow, and brown trout in beautiful meadows and canyon.
Best Times of Day
Summer offers the best fishing with diverse hatches. Fall brings excellent conditions before park closures. Match the prolific hatches.
Recommended Techniques
Small stream techniques work well. Match the hatches carefully. Stealth is essential in clear meadow water.
Water Conditions
The Gibbon has diverse character from meadows to canyon. Clear water demands careful approach. Wildlife is abundant.
Fly Selection
Caddis and mayfly patterns. Terrestrials in summer meadows. Small nymphs in faster water.
When is the Best Time to Fish Gibbon River?
Spring
Park opens. Fishing improves with warming.
Summer
Prime season with hatches. Fish all day.
Fall
Excellent conditions. Browns active.
Winter
Closed - Yellowstone winter access limited.
Recommended Equipment for Gibbon River
Rod
8 to 9-foot, 4 or 5-weight.
Line
Floating line for dry flies.
Leader & Tippet
9-foot tapered leader, 5X-6X tippet.
Waders
Breathable waders. Wet wading possible.
Essential Flies
Gibbon River Fishing Regulations
Season
Check Yellowstone National Park regulations.
Limits
Catch-and-release for wild trout.
Special Regulations
Park fishing permit required.
Bait Restrictions
Artificial flies and lures only.
Notes
Yellowstone National Park regulations apply.
Always verify current regulations with Wyoming fish and wildlife agency before fishing. Regulations can change annually.
Fly Shops & Guides Near Gibbon River
Local Fly Shops
- Blue Ribbon Flies - West Yellowstone
- Arrick's Fly Shop
- Parks' Fly Shop
Guide Services
- Yellowstone Guides
- West Yellowstone Anglers
- Gallatin Guides
Optimal Fishing Conditions
Optimal Flow
100 - 300 CFS
Best fishing conditions
Optimal Water Temperature
50° - 65°F
Ideal for active trout
Other Rivers You Might Like
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Other Wyoming Trout Rivers
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Green
Snake River
North Platte River
Firehole River
Gibbon River — frequently asked questions
When is the best time to fish the Gibbon River?
Excellent fall fishing. Browns aggressive.
What flies should I bring to the Gibbon River?
For the Gibbon River (freestone), carry: Elk Hair Caddis, Adams, PMD, Hopper, Pheasant Tail.
What water temperature is best for trout on the Gibbon River?
On the Gibbon River, trout hold between 50° and 65°F. In summer, expect temps to swing with air temperature — fish early.
Do I need a fishing license for the Gibbon River?
Yes — you need a valid Wyoming fishing license to fish the Gibbon River. Local season: Check Yellowstone National Park regulations.. Daily limit: Catch-and-release for wild trout..
What hatches should I watch for on the Gibbon River in September?
BWO is the signature hatch on the Gibbon River in September. Match size and adjust leader size to 5X-6X. The fish key in on the emergence during low-light hours, so plan to be on the water at first light.
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