Midway Geyser Basin Accesson Firehole River
River flow last 30 days
What's working on Firehole River
- 01Stable flows and clear skies indicate promising fall conditions on the Firehole River.
- 02Expect active hatches of Blue-Winged Olives, lingering Pale Morning Duns, and a strong October Caddis emergence.
- 03Midge activity is consistent year-round and should be a primary focus, especially in colder mornings.
- 04Brown trout spawning increases the importance of egg patterns for opportunistic feeders.
- 05Focus on slower, deeper runs, seams, and undercut banks for holding fish.
What to tie on at Midway Geyser Basin Access
Picked from recent reports for this stretch.
Woolly Bugger (Olive)
A reliable year-round streamer, effective for imitating leeches and baitfish, especially in the colder fall flows where trout are more aggressive.
Zebra Midge
A winter staple on the Firehole. Black or red versions in sizes 18-22 mimic the prolific midge larvae and pupae that trout depend on during the coldest months.
Buy at AmazonGriffith's Gnat
The go-to pattern for matching midge clusters on the surface. Look for rising fish in the geothermally warmed sections during the afternoon.
Zebra Midge
Midges are a primary active insect even in cold water and are expected to be hatching this month. This is a staple year-round pattern for enticing finicky trout, especially in the 20-24 size range.
Buy at AmazonIced Out Midge Pupa
Specifically designed for cold tailwater conditions, this pupa imitation matches the subsurface midge activity common in early spring and is very effective for trout keying on emerging midges.
Buy at AmazonPine Squirrel Leech (Olive)
Sculpins are active this month. Small leech patterns effectively mimic sluggish baitfish and annelids in cold water, enticing strikes from larger, lethargic trout in early spring.
Black Woolly Bugger
A slow-stripped or dead-drifted black streamer imitates leeches and sculpins which are active even in near-freezing water. It is a high-searching pattern for larger trout.
Flashback Pheasant Tail Nymph
An excellent general searching nymph for early spring, mimicking various mayfly nymphs that are active year-round and particularly as BWOs begin to emerge.
Mother's Day Caddis
The prolific Mother's Day Caddis hatch is expected in late April through May, making this dry fly a perfect imitation for adult caddis and a top choice when fish are rising.
Wyoming season by season
What changes on the water through the year, with the flies for each season.