
Logged catches

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River Rock Lake is a lake located in Gallatin County, Montana, United States. It is most popular for fishing Smallmouth bass, Largemouth bass, and Goldfish.
Learn what time of year and day to go fishing at River Rock Lake. Download Fishbrain today to look for new fishing spots, scout new fishing access, or prep for your next trip.

Disclaimer: Always check local fishing regulations, water access rights and land ownership before fishing, regardless of any catches logged in that area by the Fishbrain community. Fishbrain has mapped millions of acres of government-owned land across the USA to help you identify potential fishing access, but you are responsible for ensuring compliance with all legal requirements.
Fishing regulations in Montana can change throughout the year. Make sure to check this page before fishing for the most up to date rules and regulations for the current season. Local regulations govern when you can fish, the max size of the fish you can keep, how many fish you can keep, and more.
Below you will see fishing regulations for catching Smallmouth bass as of April 5th, 2026. To view regulations for a different fish species, please click on your preferred species in the drop-down.
Seasons
Bag limit
Aggregate
Micropterus dolomieui
8 ratings
2.1 miles away
10.1 miles away
68.5 miles away
69.8 miles away
119.4 miles away
128.4 miles away
137.8 miles away
153.8 miles away
160.6 miles away
163.0 miles away
163.1 miles away
186.8 miles away
206.2 miles away
209.8 miles away
217.5 miles away
217.5 miles away
223.2 miles away
234.1 miles away
257.4 miles away
266.8 miles away
273.8 miles away
273.9 miles away
277.8 miles away
280.5 miles away
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