Idaho · freestone
18 miles
October on the hatch chart — names and sizes, not a catch report.
Filled months are when that insect is on the chart. Best months for this river are lit.
Swipe months to stay on the year
| Insect | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Midge (Chironomidae) | ||||||||||||
| Blue-winged Olive | ||||||||||||
| Caddis | ||||||||||||
| Grasshopper (Terrestrial) | ||||||||||||
| Ant (Terrestrial) |
Hatch-chart nymphs, dries, and streamers for this river. Not a crowdsourced catch report.
Open the Snake River (Idaho) fly list →4 listed points. Map is Vellum land and Teal water — a desk chart, not a satellite.
Map loading…
BLM South Fork of the Snake River: Menan Boat Access. Official coordinates 43.75138889, -111.9794444. Narrow concrete ramp, toilets, day use only. Off Menan-Lorenzo highway, north on 3600 E, dirt road east just before the bridge. Facility fee posted on site. This is the public boat access at the South Fork / Henry's Fork confluence, the start of the Idaho main stem.
Live USGS gauge Snake River near Menan, ID. Official NWIS 43.75277778, -111.9791667. Discharge live as of 2026-09-29. Confirm parking and bank access on site.
Live USGS gauge Snake River above Eagle Rock near Idaho Falls, ID. Official NWIS 43.6047222, -112.058611. Discharge live as of 2026-09-29. Gauge site, not a developed ramp.
Live USGS gauge Snake River near Shelley, ID. Official NWIS 43.41305556, -112.135. Discharge live as of 2026-09-29. Gauge site, not a developed ramp.
Idaho fishing license required. Verify current Idaho Fish and Game Upper Snake Region rules before fishing. Statewide daily limits apply except where IDFG posts special rules. South Fork Snake and Henry's Fork have their own special rules on separate river pages. No harvest rules on this main-stem page beyond current IDFG publications.
Verify with Idaho Fish and Game. Retrieved 2026-08-31. Seasons and gear rules change.
This page covers the main Snake River in Idaho after the South Fork and Henry's Fork join near Menan. Wyoming Snake water is a separate page. The South Fork from Palisades Dam to Lorenzo is a separate page. Henry's Fork is a separate page.
Three live USGS gauges sit on this main stem: 13057000 near Menan (43.75277778, -111.9791667), 13057155 above Eagle Rock near Idaho Falls (43.6047222, -112.058611), and 13060000 near Shelley (43.41305556, -112.135). Do not use the Irwin or Heise South Fork gauges for this water.
Public boat access at the confluence is BLM Menan Boat Access (43.75138889, -111.9794444), a narrow concrete ramp, day use only. Idaho Fish and Game manages the Upper Snake Region here. Trout and mountain whitefish are the fish on this reach. Confirm current IDFG access and boat-ramp listings before you go.
Freestone
Brown Trout · Rainbow Trout · Mountain Whitefish
Freestone
Steelhead · Chinook Salmon · Rainbow Trout
Freestone
Yellowstone Cutthroat Trout · Brook Trout
Freestone
Yellowstone Cutthroat Trout · Brook Trout
Spring Creek
Rainbow Trout · Brown Trout · Brook Trout
Freestone
Westslope Cutthroat Trout · Bull Trout · Mountain Whitefish
If something here is thin or wrong, add what you know. It goes to review before it publishes.
Contribute to this river