
Check which species have trophy potential in Downey Sublateral
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Downey Sublateral is a water located in Ada County, Idaho, United States. It is most popular for fishing Rainbow trout and Largemouth bass.
Learn what time of year and day to go fishing at Downey Sublateral. 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 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 Rainbow trout as of May 12th, 2026. To view regulations for a different fish species, please click on your preferred species in the drop-down.
Seasons
Bag limit
Aggregate
Trout includes Brown Trout, Lake Trout, Golden Trout, Arctic Grayling, Cutthroat Trout, Rainbow Trout, land-locked Chinook and Coho Salmon, trout hybrids (e.g. Tiger Trout)
• Trout limit is 6, all species combined
Does not include Bull Trout and Brook Trout which are listed separately
For more information please see https://idfg.idaho.gov/rules/fish
Oncorhynchus mykiss
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21.9 miles away
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22.5 miles away
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30.9 miles away
32.1 miles away
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37.9 miles away
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