
Check which species have trophy potential in Loon Creek
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Loon Creek is a stream located in Custer County, Idaho, United States. It is also intersecting with Lemhi County, Idaho. It is most popular for fishing Brook trout, Mountain whitefish, and Cutthroat 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 Brook trout as of April 12th, 2026. To view regulations for a different fish species, please click on your preferred species in the drop-down.
Seasons
Bag limit
Salvelinus fontinalis, brookie, coaster, speckled trout
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