Big Trinity Lake

Flows into the Trinity Creek

    Big Trinity Lake in Elmore County is 28.9 acres.

    Interactive Map
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    Species Observed in Surveys

    Fish Stocking Records

    Date Species Quantity General Size
    2023/09/11 Westslope Cutthroat - Triploid 3,976 Fry (0-3 inches)
    2023/08/15 Rainbow - Hayspur Triploid 1,208 Catchable (6+ inches)
    2023/08/01 Rainbow - Hayspur Triploid 2,000 Catchable (6+ inches)
    2022/08/18 Rainbow - Hayspur Triploid 1,200 Catchable (6+ inches)
    2022/08/12 Westslope Cutthroat - Triploid 3,530 Fry (0-3 inches)
    2022/07/21 Rainbow - Hayspur Triploid 2,015 Catchable (6+ inches)
    2021/08/18 Rainbow - Hayspur Triploid 1,200 Catchable (6+ inches)
    2021/07/26 Westslope Cutthroat - Triploid 4,039 Fry (0-3 inches)
    2021/06/24 Rainbow - Hayspur Triploid 2,475 Catchable (6+ inches)
    2020/08/25 Westslope Cutthroat - Triploid 1,989 Fry (0-3 inches)
    2020/08/11 Rainbow - Hayspur Triploid 1,253 Catchable (12-14 inches)
    2020/07/27 Rainbow - Hayspur Triploid 1,978 Catchable (12-14 inches)
    2019/08/28 Westslope Cutthroat 2,000 Fry (0-3 inches)
    2019/08/21 Rainbow - Hayspur Triploid 1,280 Catchable (6+ inches)
    2019/07/16 Rainbow - Hayspur Triploid 2,004 Catchable (6+ inches)
    2018/08/16 Westslope Cutthroat 2,005 Fry (0-3 inches)
    2018/08/14 Rainbow - Hayspur Triploid 1,469 Catchable (6+ inches)
    2018/07/18 Rainbow - Hayspur Triploid 2,058 Catchable (6+ inches)
    2017/08/10 Rainbow - Hayspur Triploid 1,202 Catchable (6+ inches)
    2017/08/03 Westslope Cutthroat 2,003 Fry (0-3 inches)
    2016/08/25 Rainbow - Hayspur Triploid 1,900 Catchable (6+ inches)
    2016/08/16 Westslope Cutthroat 4,006 Fry (0-3 inches)
    2016/07/15 Rainbow - Hayspur Triploid 2,896 Catchable (6+ inches)
    2015/08/25 Rainbow - Troutlodge Triploid 944 Catchable (6+ inches)
    2015/07/27 Rainbow - Troutlodge Triploid 910 Catchable (6+ inches)
    2015/07/21 Westslope Cutthroat 2,004 Fry (0-3 inches)
    2014/08/29 Rainbow - Troutlodge Triploid 975 Catchable (6+ inches)
    2014/08/05 Westslope Cutthroat 1,983 Fry (0-3 inches)
    2014/07/31 Rainbow - Hayspur Triploid 1,400 Catchable (6+ inches)
    2013/08/06 Westslope Cutthroat 2,004 Fry (0-3 inches)
    2013/07/23 Rainbow - Troutlodge Triploid 1,307 Catchable (6+ inches)
    2013/07/09 Rainbow - Troutlodge Triploid 1,446 Catchable (6+ inches)
    2012/09/07 Westslope Cutthroat 2,000 Fry (0-3 inches)
    2012/07/23 Rainbow - Troutlodge Triploid 1,440 Catchable (6+ inches)
    2011/09/07 Westslope Cutthroat 2,007 Fry (0-3 inches)
    2011/08/30 Rainbow - Troutlodge Triploid 1,000 Catchable (6+ inches)
    2011/08/02 Rainbow - Troutlodge Triploid 1,553 Catchable (6+ inches)
    2010/09/15 Westslope Cutthroat 1,004 Fry (0-3 inches)
    2010/08/24 Rainbow - Troutlodge Triploid 1,040 Catchable (6+ inches)
    2010/07/22 Rainbow - Troutlodge Triploid 875 Catchable (6+ inches)
    2009/09/17 Westslope Cutthroat 2,000 Fry (0-3 inches)
    2009/08/17 Rainbow - Troutlodge Triploid 960 Catchable (6+ inches)
    2009/07/23 Rainbow - Troutlodge Triploid 1,504 Catchable (6+ inches)
    2008/09/29 Westslope Cutthroat 2,000 Fry (0-3 inches)
    2008/08/19 Rainbow - Troutlodge Triploid 840 Catchable (6+ inches)
    2008/07/09 Rainbow - Troutlodge Triploid 1,650 Catchable (6+ inches)
    2007/08/23 Rainbow - Troutlodge Triploid 1,575 Catchable (6+ inches)
    2007/08/06 Henrys Lake Cutthroat 2,019 Fry (0-3 inches)
    2007/07/05 Rainbow - Troutlodge Triploid 1,540 Catchable (6+ inches)
    2006/08/28 Westslope Cutthroat 2,000 Fry (0-3 inches)
    2006/08/09 Rainbow - Troutlodge Triploid 1,960 Catchable (6+ inches)
    2006/07/25 Rainbow - Troutlodge Triploid 1,540 Catchable (6+ inches)
    2005/08/18 Rainbow - Troutlodge Triploid 2,550 Catchable (6+ inches)
    2005/08/17 Henrys Lake Cutthroat 2,000 Fry (0-3 inches)
    2004/09/02 Henrys Lake Cutthroat 2,500 Fry (0-3 inches)
    2004/08/19 Rainbow - Troutlodge Triploid 990 Catchable (6+ inches)
    2004/07/20 Rainbow - Troutlodge Triploid 1,513 Catchable (6+ inches)
    2003/08/26 Henrys Lake Cutthroat 2,000 Fry (0-3 inches)
    2003/08/12 Rainbow - Troutlodge Triploid 1,099 Catchable (6+ inches)
    2003/07/17 Rainbow - Troutlodge Triploid 1,890 Catchable (6+ inches)
    2002/08/21 Rainbow - Troutlodge Triploid 1,000 Catchable (6+ inches)
    2002/08/19 Henrys Lake Cutthroat 2,000 Fry (0-3 inches)
    2002/07/03 Rainbow - Troutlodge Triploid 1,500 Catchable (6+ inches)
    2001/08/16 Henrys Lake Cutthroat 2,000 Fry (0-3 inches)
    2001/07/18 Rainbow - Troutlodge Triploid 1,500 Catchable (6+ inches)
    2001/06/26 Rainbow - Troutlodge Triploid 1,000 Catchable (6+ inches)
    2000/09/12 Henrys Lake Cutthroat 2,000 Fry (0-3 inches)
    2000/08/01 Rainbow - Hayspur Triploid 1,500 Catchable (6+ inches)
    2000/07/12 Rainbow - Hayspur Triploid 1,000 Catchable (6+ inches)
    1999/09/08 Henrys Lake Cutthroat 2,000 Fry (0-3 inches)
    1999/08/26 Domestic Kamloops 1,000 Catchable (6+ inches)
    1999/07/22 Domestic Kamloops 1,000 Catchable (6+ inches)
    1998/09/11 Henrys Lake Cutthroat 2,000 Fry (0-3 inches)
    1998/08/19 Domestic Kamloops 1,500 Catchable (6+ inches)
    1998/07/22 Domestic Kamloops 1,250 Catchable (6+ inches)
    1997/09/03 Henrys Lake Cutthroat 1,000 Fry (0-3 inches)
    1997/08/06 Domestic Kamloops 1,000 Catchable (6+ inches)
    1997/07/23 Domestic Kamloops 1,500 Catchable (6+ inches)
    1996/08/27 Domestic Kamloops 1,000 Catchable (6+ inches)
    1996/07/29 Domestic Kamloops 2,000 Catchable (6+ inches)
    1996/07/24 Henrys Lake Cutthroat 2,112 Fry (0-3 inches)
    1995/08/24 Rainbow - Hayspur Diploid 1,000 Catchable (6+ inches)
    1995/08/18 Henrys Lake Cutthroat 2,000 Fry (0-3 inches)
    1995/07/26 Domestic Kamloops 2,000 Catchable (6+ inches)
    1994/09/15 Henrys Lake Cutthroat 1,000 Fry (0-3 inches)
    1994/08/03 Troutlodge 1,000 Catchable (6+ inches)
    1994/06/30 Troutlodge 1,950 Catchable (6+ inches)
    1993/09/02 Erwin Rainbow 1,000 Catchable (6+ inches)
    1993/08/05 Erwin Rainbow 2,040 Catchable (6+ inches)
    1992/08/17 Domestic Kamloops 1,000 Catchable (6+ inches)
    1992/07/01 Domestic Kamloops 2,000 Catchable (6+ inches)
    1991/08/08 Rainbow - Hayspur Diploid 1,000 Catchable (6+ inches)
    1991/07/30 Rainbow - Hayspur Diploid 2,000 Fingerling (3-6 inches)
    1990/08/15 Rainbow - Hayspur Diploid 1,000 Catchable (6+ inches)
    1990/07/02 Mt Lassen Rainbow 2,000 Catchable (6+ inches)
    1989/08/28 Rainbow - Hayspur Diploid 550 Catchable (6+ inches)
    1989/07/18 Rainbow - Hayspur Diploid 1,100 Catchable (6+ inches)
    1988/08/22 Rainbow Unspecified 1,250 Catchable (6+ inches)
    1988/07/25 Mt Lassen Rainbow 1,298 Catchable (6+ inches)
    1988/06/27 Mt Lassen Rainbow 1,202 Catchable (6+ inches)
    1987/08/17 Mt Lassen Rainbow 1,296 Catchable (6+ inches)
    1987/07/22 Mt Lassen Rainbow 1,311 Catchable (6+ inches)
    1987/06/22 Mt Lassen Rainbow 1,238 Catchable (6+ inches)
    1986/08/13 Rainbow Unspecified 1,198 Catchable (6+ inches)
    1986/07/17 Mt Lassen Rainbow 1,190 Catchable (6+ inches)
    1985/08/20 Mt Lassen Rainbow 1,014 Catchable (6+ inches)
    1985/07/01 Rainbow Unspecified 1,344 Catchable (6+ inches)
    1984/09/19 Rainbow Unspecified 504 Catchable (6+ inches)
    1984/08/03 Rainbow Unspecified 1,887 Catchable (6+ inches)
    1982/08/24 Rainbow Unspecified 2,377 Catchable (6+ inches)
    1981/07/10 Rainbow Unspecified 2,115 Catchable (6+ inches)
    1980/07/14 Rainbow Unspecified 2,350 Catchable (6+ inches)
    1979/07/11 Rainbow Unspecified 2,350 Catchable (6+ inches)
    1978/07/26 Rainbow Unspecified 3,350 Catchable (6+ inches)
    1977/06/21 Rainbow Unspecified 4,185 Catchable (6+ inches)
    1976/07/26 Rainbow Unspecified 2,000 Catchable (6+ inches)
    1975/07/31 Rainbow Unspecified 1,350 Catchable (6+ inches)
    1974/07/17 Rainbow Unspecified 3,000 Catchable (6+ inches)
    1973/07/16 Rainbow Unspecified 3,000 Catchable (6+ inches)
    1972/07/24 Rainbow Unspecified 3,000 Catchable (6+ inches)
    1971/08/03 Rainbow Unspecified 3,000 Catchable (6+ inches)
    1970/07/20 Rainbow Unspecified 3,000 Catchable (6+ inches)
    1969/07/09 Rainbow Unspecified 2,998 Catchable (6+ inches)
    1968/07/02 Rainbow Unspecified 3,020 Fingerling (3-6 inches)
    Source: IDFG Fish Stocking Database.

    Licenses and Tags

    Learn more about IDFG Licenses, Tags & Permits
     

    Fishing Rules, 2022 - 2024

    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 after the second day of the season.

    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 must be followed when fishing for Brook Trout

    Bull Trout

    • Bull Trout limit is 0, catch-and-release

    Kokanee

    • Kokanee limit is 6

    Sturgeon

    • Sturgeon limit is 0, catch-and-release
    • Sturgeon must not be removed from the water and must be released upon landing
    • Barbless hooks are required
    • Use of a sliding swivel device to secure a weight, and a lighter test line to secure weight to sliding swivel device is 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
    • Does not include Bull Trout and Brook Trout which 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 must be followed 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, size or possession limit
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