Montana · Freestone · Rockies
Bitterroot River
Freestone river; broad valley access and seasonal temperature concerns.
Montana · public-access reaches. This page is what the desk knows about the water itself. What it is doing today — flow, water temperature, weather, and the hazards those produce — is a reading with a date on it, and it lives in Trip Prep.
Plan a trip on Bitterroot RiverStores this page so it opens with no signal. Live flow and weather are never stored.
Who manages it
Montana Fish, Wildlife & Parks
These links were checked against the live agency site on 2026-09-01. Rules for a water change inside a season, so the agency’s own page on the day you go is the only current answer — this desk does not hold one.
Directory review
Review provenance unavailable
The fleet directory names this water differently, and nothing records which of its records is the Bitterroot River this desk plans on, so the desk will not borrow a review date from any of them. Linking them is a review task for the directory’s owner, not a guess for this page. The directory’s records:
- Bitterroot River (public FAS corridor — Lolo to Stevensville approaches) (Field Sense Navigator, opens in a new window)
- Bitterroot River (public FAS corridor) (Field Sense Navigator, opens in a new window)
The agency links on this page were checked on 2026-09-01; check the agency’s own page the day you go.
How access works here
Numbered public access-site network
This water sits in Montana's Fishing Access Site network. Reaches between sites are usually floatable and wadeable below the high-water mark, but you get on and off at the signed sites.
Launch · Many FAS points have a concrete or gravel ramp suitable for a drift boat or raft. Some are hand-launch only — the FAS list says which.
Parking · Parking is at designated access points. A pullout that looks fine is not automatically legal or safe to leave a vehicle in.
Montana runs a numbered Fishing Access Site (FAS) network — most named reaches have signed FAS points with parking, and many have a ramp. Montana also has a stream access law: below the ordinary high-water mark of most rivers is public, but you still have to get there from a public point.
Gauge
A public gauge is mapped
Flow and water temperature for this water are read from USGS site 12352500, Bitterroot River near Missoula, MT. It is an official public gauge, not a fishing pin: it describes the river at one point, and the reach you stand in may be doing something else.
Species · reviewed
4 plausible here
Species commonly present in Bitterroot River. Seasons, slot limits and species-specific closures still come from Montana Fish, Wildlife & Parks.
Cutthroat trout
48–62°F published preference · handling becomes a conservation problem at 66°F
Rainbow trout
52–64°F published preference · handling becomes a conservation problem at 68°F
Brown trout
54–67°F published preference · handling becomes a conservation problem at 68°F
Mountain whitefish
46–64°F published preference · handling becomes a conservation problem at 68°F