Big Trinity Lake

Flows into the Trinity Creek

    Big Trinity Lake in Elmore County is 28.9 acres.

    Bureau of Land Management, Esri Canada, Esri, HERE, Garmin, INCREMENT P, USGS, METI/NASA, EPA, USDA |
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    Species Observed in Surveys

    Fish Stocking Records

    Date
    Species
    Quantity
    General Size
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    Date
    Species
    Quantity
    General Size
    2024/09/06 Cutthroat Trout - Westslope 4,016 Fry (0-3 inches)
    2024/08/29 Rainbow Trout 1,320 Catchable (6+ inches)
    2024/08/20 Rainbow Trout 1,162 Catchable (12-14 inches)
    2024/07/22 Rainbow Trout 1,050 Catchable (12-14 inches)
    2023/09/11 Cutthroat Trout - Westslope 3,976 Fry (0-3 inches)
    2023/08/15 Rainbow Trout - Triploid 1,208 Catchable (6+ inches)
    2023/08/01 Rainbow Trout - Triploid 2,000 Catchable (6+ inches)
    2022/08/18 Rainbow Trout - Triploid 1,200 Catchable (6+ inches)
    2022/08/12 Cutthroat Trout - Westslope 3,530 Fry (0-3 inches)
    2022/07/21 Rainbow Trout - Triploid 2,015 Catchable (6+ inches)
    2021/08/18 Rainbow Trout - Triploid 1,200 Catchable (6+ inches)
    2021/07/26 Cutthroat Trout - Westslope 4,039 Fry (0-3 inches)
    2021/06/24 Rainbow Trout - Triploid 2,475 Catchable (6+ inches)
    2020/08/25 Cutthroat Trout - Westslope 1,989 Fry (0-3 inches)
    2020/08/11 Rainbow Trout - Triploid 1,253 Catchable (12-14 inches)
    2020/07/27 Rainbow Trout - Triploid 1,978 Catchable (12-14 inches)
    2019/08/28 Cutthroat Trout - Westslope 2,000 Fry (0-3 inches)
    2019/08/21 Rainbow Trout - Triploid 1,280 Catchable (6+ inches)
    2019/07/16 Rainbow Trout - Triploid 2,004 Catchable (6+ inches)
    2018/08/16 Cutthroat Trout - Westslope 2,005 Fry (0-3 inches)
    2018/08/14 Rainbow Trout - Triploid 1,469 Catchable (6+ inches)
    2018/07/18 Rainbow Trout - Triploid 2,058 Catchable (6+ inches)
    2017/08/10 Rainbow Trout - Triploid 1,202 Catchable (6+ inches)
    2017/08/03 Cutthroat Trout - Westslope 2,003 Fry (0-3 inches)
    2016/08/25 Rainbow Trout - Triploid 950 Catchable (6+ inches)
    2016/08/16 Cutthroat Trout - Westslope 2,003 Fry (0-3 inches)
    2016/07/15 Rainbow Trout - Triploid 1,448 Catchable (6+ inches)
    2015/08/25 Rainbow Trout - Triploid 944 Catchable (6+ inches)
    2015/07/27 Rainbow Trout - Triploid 910 Catchable (6+ inches)
    2015/07/21 Cutthroat Trout - Westslope 2,004 Fry (0-3 inches)
    2014/08/29 Rainbow Trout - Triploid 975 Catchable (6+ inches)
    2014/08/05 Cutthroat Trout - Westslope 1,983 Fry (0-3 inches)
    2014/07/31 Rainbow Trout - Triploid 1,400 Catchable (6+ inches)
    2013/08/06 Cutthroat Trout - Westslope 2,004 Fry (0-3 inches)
    2013/07/23 Rainbow Trout - Triploid 1,307 Catchable (6+ inches)
    2013/07/09 Rainbow Trout - Triploid 1,446 Catchable (6+ inches)
    2012/09/07 Cutthroat Trout - Westslope 2,000 Fry (0-3 inches)
    2012/07/23 Rainbow Trout - Triploid 1,440 Catchable (6+ inches)
    2011/09/07 Cutthroat Trout - Westslope 2,007 Fry (0-3 inches)
    2011/08/30 Rainbow Trout - Triploid 1,000 Catchable (6+ inches)
    2011/08/02 Rainbow Trout - Triploid 1,553 Catchable (6+ inches)
    2010/09/15 Cutthroat Trout - Westslope 1,004 Fry (0-3 inches)
    2010/08/24 Rainbow Trout - Triploid 1,040 Catchable (6+ inches)
    2010/07/22 Rainbow Trout - Triploid 875 Catchable (6+ inches)
    2009/09/17 Cutthroat Trout - Westslope 2,000 Fry (0-3 inches)
    2009/08/17 Rainbow Trout - Triploid 960 Catchable (6+ inches)
    2009/07/23 Rainbow Trout - Triploid 1,504 Catchable (6+ inches)
    2008/09/29 Cutthroat Trout - Westslope 2,000 Fry (0-3 inches)
    2008/08/19 Rainbow Trout - Triploid 840 Catchable (6+ inches)
    2008/07/09 Rainbow Trout - Triploid 1,650 Catchable (6+ inches)
    2007/08/23 Rainbow Trout - Triploid 1,575 Catchable (6+ inches)
    2007/08/06 Cutthroat Trout - Yellowstone 2,019 Fry (0-3 inches)
    2007/07/05 Rainbow Trout - Triploid 1,540 Catchable (6+ inches)
    2006/08/28 Cutthroat Trout - Westslope 2,000 Fry (0-3 inches)
    2006/08/09 Rainbow Trout - Triploid 1,960 Catchable (6+ inches)
    2006/07/25 Rainbow Trout - Triploid 1,540 Catchable (6+ inches)
    2005/08/18 Rainbow Trout - Triploid 2,550 Catchable (6+ inches)
    2005/08/17 Cutthroat Trout - Yellowstone 2,000 Fry (0-3 inches)
    2004/09/02 Cutthroat Trout - Yellowstone 2,500 Fry (0-3 inches)
    2004/08/19 Rainbow Trout - Triploid 990 Catchable (6+ inches)
    2004/07/20 Rainbow Trout - Triploid 1,513 Catchable (6+ inches)
    2003/08/26 Cutthroat Trout - Yellowstone 2,000 Fry (0-3 inches)
    2003/08/12 Rainbow Trout - Triploid 1,099 Catchable (6+ inches)
    2003/07/17 Rainbow Trout - Triploid 1,890 Catchable (6+ inches)
    2002/08/21 Rainbow Trout - Triploid 1,000 Catchable (6+ inches)
    2002/08/19 Cutthroat Trout - Yellowstone 2,000 Fry (0-3 inches)
    2002/07/03 Rainbow Trout - Triploid 1,500 Catchable (6+ inches)
    2001/08/16 Cutthroat Trout - Yellowstone 2,000 Fry (0-3 inches)
    2001/07/18 Rainbow Trout - Triploid 1,500 Catchable (6+ inches)
    2001/06/26 Rainbow Trout - Triploid 1,000 Catchable (6+ inches)
    2000/09/12 Cutthroat Trout - Yellowstone 2,000 Fry (0-3 inches)
    2000/08/01 Rainbow Trout - Triploid 1,500 Catchable (6+ inches)
    2000/07/12 Rainbow Trout - Triploid 1,000 Catchable (6+ inches)
    1999/09/08 Cutthroat Trout - Yellowstone 2,000 Fry (0-3 inches)
    1999/08/26 Rainbow Trout 1,000 Catchable (6+ inches)
    1999/07/22 Rainbow Trout 1,000 Catchable (6+ inches)
    1998/09/11 Cutthroat Trout - Yellowstone 2,000 Fry (0-3 inches)
    1998/08/19 Rainbow Trout 1,500 Catchable (6+ inches)
    1998/07/22 Rainbow Trout 1,250 Catchable (6+ inches)
    1997/09/03 Cutthroat Trout - Yellowstone 1,000 Fry (0-3 inches)
    1997/08/06 Rainbow Trout 1,000 Catchable (6+ inches)
    1997/07/23 Rainbow Trout 1,500 Catchable (6+ inches)
    1996/08/27 Rainbow Trout 1,000 Catchable (6+ inches)
    1996/07/29 Rainbow Trout 2,000 Catchable (6+ inches)
    1996/07/24 Cutthroat Trout - Yellowstone 2,112 Fry (0-3 inches)
    1995/08/24 Rainbow Trout 1,000 Catchable (6+ inches)
    1995/08/18 Cutthroat Trout - Yellowstone 2,000 Fry (0-3 inches)
    1995/07/26 Rainbow Trout 2,000 Catchable (6+ inches)
    1994/09/15 Cutthroat Trout - Yellowstone 1,000 Fry (0-3 inches)
    1994/08/03 Rainbow Trout - Triploid 1,000 Catchable (6+ inches)
    1994/06/30 Rainbow Trout - Triploid 1,950 Catchable (6+ inches)
    1993/09/02 Rainbow Trout 1,000 Catchable (6+ inches)
    1993/08/05 Rainbow Trout 2,040 Catchable (6+ inches)
    1992/08/17 Rainbow Trout 1,000 Catchable (6+ inches)
    1992/07/01 Rainbow Trout 2,000 Catchable (6+ inches)
    1991/08/08 Rainbow Trout 1,000 Catchable (6+ inches)
    1991/07/30 Rainbow Trout 2,000 Fingerling (3-6 inches)
    1990/08/15 Rainbow Trout 1,000 Catchable (6+ inches)
    1990/07/02 Rainbow Trout 2,000 Catchable (6+ inches)
    1989/08/28 Rainbow Trout 550 Catchable (6+ inches)
    1989/07/18 Rainbow Trout 1,100 Catchable (6+ inches)
    1988/08/22 Rainbow Trout 1,250 Catchable (6+ inches)
    1988/07/25 Rainbow Trout 1,298 Catchable (6+ inches)
    1988/06/27 Rainbow Trout 1,202 Catchable (6+ inches)
    1987/08/17 Rainbow Trout 1,296 Catchable (6+ inches)
    1987/07/22 Rainbow Trout 1,311 Catchable (6+ inches)
    1987/06/22 Rainbow Trout 1,238 Catchable (6+ inches)
    1986/08/13 Rainbow Trout 1,198 Catchable (6+ inches)
    1986/07/17 Rainbow Trout 1,190 Catchable (6+ inches)
    1985/08/20 Rainbow Trout 1,014 Catchable (6+ inches)
    1985/07/01 Rainbow Trout 1,344 Catchable (6+ inches)
    1984/09/19 Rainbow Trout 504 Catchable (6+ inches)
    1984/08/03 Rainbow Trout 1,887 Catchable (6+ inches)
    1982/08/24 Rainbow Trout 2,377 Catchable (6+ inches)
    1981/07/10 Rainbow Trout 2,115 Catchable (6+ inches)
    1980/07/14 Rainbow Trout 2,350 Catchable (6+ inches)
    1979/07/11 Rainbow Trout 2,350 Catchable (6+ inches)
    1978/07/26 Rainbow Trout 3,350 Catchable (6+ inches)
    1977/06/21 Rainbow Trout 4,185 Catchable (6+ inches)
    1976/07/26 Rainbow Trout 2,000 Catchable (6+ inches)
    1975/07/31 Rainbow Trout 1,350 Catchable (6+ inches)
    1974/07/17 Rainbow Trout 3,000 Catchable (6+ inches)
    1973/07/16 Rainbow Trout 3,000 Catchable (6+ inches)
    1972/07/24 Rainbow Trout 3,000 Catchable (6+ inches)
    1971/08/03 Rainbow Trout 3,000 Catchable (6+ inches)
    1970/07/20 Rainbow Trout 3,000 Catchable (6+ inches)
    1969/07/09 Rainbow Trout 2,998 Catchable (6+ inches)
    1968/07/02 Rainbow Trout 3,020 Fingerling (3-6 inches)
    Source: IDFG Fish Stocking Database.

    Licenses and Tags

    Learn more about IDFG Licenses, Tags & Permits
     

    Fishing Rules, 2025 - 2027

    All Waters Open All Year

    Except as modified in Special Rules
    Fishing is not allowed within the posted upstream and downstream boundary of any fish weir or trap.

    Daily Bag Limits

    The following daily bag limits apply to all waters within each region except as modified in the Special Rules. The possession limit is 3-times the daily bag limit.

    Special Rules

    Big and Little Trinity Lakes
    • No motors
    Magic Valley Region Bag Limits
    Bass (Largemouth and Smallmouth)

    • Bass limit is 6, both species combined
    • None under 12 inches

    Brook Trout

    • Brook Trout limit is 25
    • Harvest allowed during any open season unless otherwise noted under Special Rules - if gear or bait restrictions are listed, they apply when fishing for Brook Trout

    Bull Trout

    • Bull Trout - catch-and-release

    Kokanee

    • Kokanee limit is 6

    Sturgeon

    • Sturgeon - catch-and-release
    • Sturgeon must not be removed from the water and must be released upon landing
    • Barbless hooks, sliding swivel device to secure a weight, and a lighter test line to secure weight to sliding swivel device are required. See fishing regulations for details

    Tiger Muskie

    • Tiger Muskie limit is 2, none under 40 inches

    Trout includes Brown Trout, Lake Trout, Golden Trout, Arctic Grayling, Cutthroat Trout, Rainbow Trout, land-locked Chinook and Coho Salmon, trout hydrids (.e.g. Tiger Trout)

    • Trout limit is 6, all species combined
    • In rivers and streams, only 2 of the 6 trout may be Cutthroat Trout
    • Bull Trout and Brook Trout are listed separately

    Walleye

    • Walleye limit is 6

    Whitefish

    • Whitefish limit is 25
    • Harvest allowed during any open season unless otherwise noted under Special Rules - if gear or bait restrictions are listed, they apply when fishing for whitefish

    Protected Nongame Fish includes Northern Leatherside Chub, Shoshone Sculpin, Wood River Sculpin, and Bluehead Sucker (also known as Green Sucker)

    • May not be harvested or possessed

    All Other Fish Species includes bullfrogs and crayfish

    • No bag, length or possession limit
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