Idaho Fishing Reports ยท Upper Snake Region
Warm River is a spring-fed tributary of the Henrys Fork with a campground and an easy trail along an old railroad grade, good for small rainbows and brookies.
Looking for the latest Warm River report? This page is updated by the AvidMax fly shop team with live flows, current conditions, hatches and the flies working now on the Warm River.
Current flows
There is no live gauge on this stretch. Check nearby gauges on the Idaho fishing reports page.
Wind forecast
Warm River fishing report
Updated November 7, 2026.
Spring flows keep the water clear and steady.
Small nymphs and attractor dries on the trail stretch above the campground.
Load your fly box
Before you head to Warm River Campground, bring: Pheasant Tail Nymph #14-18, Parachute Adams #14-18, Elk Hair Caddis #14-16, Stimulator #12-16, Zebra Midge #18-22, RS2 Emerger #18-22, JuJu Baetis #18-22, Black Beauty #20-24, Egg #14-16, Squirmy Wormie #12-14, Scud Bomb #14-16.
Flies working right now
The flies above that we have in stock right now.
Warm River details
| Access | Warm River Campground and the rail trail upstream. |
|---|---|
| Elevation | About 5,300 ft |
| Nearest town | Ashton, Idaho |
| Best season | Late spring through fall |
| Fish | Rainbow and brook trout |
| Regulations | Check the Idaho Department of Fish and Game seasons and rules before you go. An Idaho fishing license is required for anglers 14 and older, plus a steelhead or salmon permit where those fish are targeted. |
| Leaders and tippet | 7.5 to 9 ft leaders, 5X tippet |
| Camping | Warm River Campground |
| Kids | Yes. Easy trail and small water. |
| Good to know | A popular family spot in summer. Go early. |
Fishing by season
Winter
Quiet, low use.
Spring
Caddis.
Summer
Attractors and caddis.
Fall
BWOs.
How to get there
From Ashton, take Highway 47 east to Warm River Campground.