
Check which species have trophy potential in Main Fork
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Main Fork is a stream located in Lemhi County, Idaho, United States. It is also intersecting with Custer County, Idaho. It is most popular for fishing Bull trout.
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 Idaho 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 Bull trout as of April 22nd, 2026. To view regulations for a different fish species, please click on your preferred species in the drop-down.
Seasons
Bag limit
Salvelinus confluentus
37.1 miles away
43.5 miles away
77.4 miles away
77.5 miles away
79.5 miles away
81.8 miles away
87.2 miles away
89.7 miles away
90.1 miles away
93.6 miles away
96.0 miles away
97.1 miles away
97.5 miles away
98.2 miles away
99.9 miles away
102.2 miles away
106.0 miles away
113.6 miles away
113.7 miles away
115.5 miles away
116.6 miles away
116.9 miles away
122.1 miles away
125.6 miles away
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