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Sun River is a stream located in Cascade County, Montana, United States. It is also intersecting with Lewis and Clark County, Montana. It is most popular for fishing Northern pike, Brown trout, and Rainbow trout.
Learn what time of year and day to go fishing at Sun River. 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 Northern pike as of April 1st, 2026. To view regulations for a different fish species, please click on your preferred species in the drop-down.
Seasons
Bag limit
Esox lucius
4 ratings
13.6 miles away
71.6 miles away
125.3 miles away
126.1 miles away
127.3 miles away
133.6 miles away
135.1 miles away
189.1 miles away
236.2 miles away
243.5 miles away
244.0 miles away
260.2 miles away
262.0 miles away
264.0 miles away
268.7 miles away
269.6 miles away
273.3 miles away
280.5 miles away
284.0 miles away
284.6 miles away
286.7 miles away
292.3 miles away
305.7 miles away
310.8 miles away
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