Mosquito Flat Reservoir

Flows into the Challis Creek

  • Recommended Fishing Water

Mosquito Flat Reservoir in Custer County is 49.4 acres.

Interactive Map
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Facilities

Motor Restriction
No
Boat Ramp
Yes
Dock
No
Toilet
Yes
Campground
Yes
ADA Access
Yes

Recommended Game Fish

Species Observed in Surveys

Fish Stocking Records

Date Species Quantity General Size
2024/08/01 Rainbow - Hayspur Triploid 1,343 Catchable (12-14 inches)
2024/07/18 Rainbow - Hayspur Triploid 32 Catchable (12-14 inches)
2024/07/18 Rainbow - Troutlodge Triploid 668 Catchable (12-14 inches)
2024/06/10 Rainbow - Hayspur Triploid 1,015 Catchable (12-14 inches)
2023/09/27 Rainbow - Hayspur Triploid 1,210 Catchable (12-14 inches)
2023/09/06 Rainbow - Hayspur Triploid 1,207 Catchable (12-14 inches)
2023/07/28 Rainbow - Hayspur Triploid 1,051 Catchable (12-14 inches)
2023/07/03 Kokanee - Late Spawner - Triploid 9,241 Fry (0-3 inches)
2023/06/29 Rainbow - Hayspur Triploid 1,068 Catchable (12-14 inches)
2022/07/11 Rainbow - Hayspur Triploid 1,015 Catchable (12-14 inches)
2022/06/08 Rainbow - Hayspur Triploid 1,006 Catchable (12-14 inches)
2022/06/02 Kokanee - Late Spawner 7,212 Fry (0-3 inches)
2022/05/19 Rainbow - Hayspur Triploid 1,008 Catchable (12-14 inches)
2021/08/23 Rainbow - Hayspur Triploid 2,236 Catchable (6+ inches)
2021/08/06 Chinook Summer 184 Catchable (15-19 inches)
2021/07/23 Chinook Summer 67 Catchable (15-19 inches)
2021/07/08 Chinook Summer 250 Catchable (15-19 inches)
2021/07/08 Rainbow - Hayspur Triploid 2,114 Catchable (12-14 inches)
2021/06/14 Kokanee - Late Spawner - Triploid 16,603 Fry (0-3 inches)
2021/06/11 Rainbow - Hayspur Triploid 2,122 Catchable (12-14 inches)
2020/09/25 Rainbow - Troutlodge Triploid 1,500 Catchable (6+ inches)
2020/07/10 Rainbow - Hayspur Triploid 1,000 Catchable (6+ inches)
2020/06/19 Kokanee - Early Spawner 9,081 Fry (0-3 inches)
2020/05/26 Rainbow - Hayspur Triploid 2,002 Catchable (12-14 inches)
2019/10/24 Rainbow - Hayspur Triploid 286 Catchable (12-14 inches)
2019/10/24 Rainbow - Hayspur Triploid 833 Catchable (6+ inches)
2019/10/02 Rainbow - Hayspur Triploid 1,008 Catchable (12-14 inches)
2019/06/11 Rainbow - Hayspur Triploid 1,499 Catchable (12-14 inches)
2019/05/31 Rainbow - Hayspur Triploid 1,549 Catchable (12-14 inches)
2018/08/24 Rainbow - Hayspur Triploid 496 Catchable (12-14 inches)
2018/08/24 Rainbow - Hayspur Triploid 1,500 Catchable (6+ inches)
2018/07/13 Rainbow - Hayspur Triploid 901 Catchable (12-14 inches)
2018/06/13 Rainbow - Hayspur Triploid 1,800 Catchable (12-14 inches)
2018/06/05 Kokanee - Late Spawner 6,020 Fry (0-3 inches)
2017/07/10 Rainbow - Hayspur Triploid 1,221 Catchable (6+ inches)
2017/06/21 Rainbow - Hayspur Triploid 1,238 Catchable (6+ inches)
2017/05/25 Rainbow - Hayspur Triploid 900 Catchable (6+ inches)
2016/08/22 Rainbow - Hayspur Triploid 1,208 Catchable (6+ inches)
2016/07/21 Rainbow - Hayspur Triploid 3,624 Catchable (6+ inches)
2016/06/24 Rainbow - Hayspur Triploid 1,802 Catchable (6+ inches)
2016/06/09 Kokanee - Early Spawner 14,108 Fingerling (3-6 inches)
2015/08/13 Rainbow - Hayspur Triploid 998 Catchable (6+ inches)
2015/07/16 Rainbow - Hayspur Triploid 1,501 Catchable (6+ inches)
2015/06/25 Rainbow - Hayspur Triploid 1,502 Catchable (6+ inches)
2015/05/29 Rainbow - Hayspur Triploid 1,652 Catchable (6+ inches)
2014/08/21 Rainbow - Hayspur Triploid 999 Catchable (6+ inches)
2014/07/24 Rainbow - Hayspur Triploid 1,562 Catchable (6+ inches)
2014/06/27 Rainbow - Hayspur Triploid 1,661 Catchable (6+ inches)
2014/05/16 Rainbow - Hayspur Triploid 1,500 Catchable (6+ inches)
2013/10/19 Rainbow - Troutlodge Triploid 1,000 Catchable (6+ inches)
2013/06/26 Rainbow - Hayspur Triploid 1,500 Catchable (6+ inches)
2013/05/23 Rainbow - Hayspur Triploid 1,513 Catchable (6+ inches)
2012/07/28 Rainbow - Hayspur Triploid 1,500 Catchable (6+ inches)
2012/06/21 Rainbow - Hayspur Triploid 1,524 Catchable (6+ inches)
2012/05/24 Rainbow - Hayspur Triploid 1,507 Catchable (6+ inches)
2011/10/13 Rainbow - Troutlodge Triploid 1,001 Catchable (6+ inches)
2011/10/13 Westslope Cutthroat 19,654 Fry (0-3 inches)
2011/07/14 Rainbow - Troutlodge Triploid 1,500 Catchable (6+ inches)
2011/06/17 Rainbow - Troutlodge Triploid 1,627 Catchable (6+ inches)
2011/05/26 Rainbow - Troutlodge Triploid 1,501 Catchable (6+ inches)
2010/10/08 Rainbow - Troutlodge Triploid 2,099 Catchable (6+ inches)
2010/07/01 Rainbow - Troutlodge Triploid 1,506 Catchable (6+ inches)
2010/06/10 Rainbow - Troutlodge Triploid 1,519 Catchable (6+ inches)
2010/05/25 Rainbow - Troutlodge Triploid 1,506 Catchable (6+ inches)
2009/09/17 Rainbow - Hayspur Triploid 1,040 Catchable (6+ inches)
2009/07/14 Rainbow - Troutlodge Triploid 1,540 Catchable (6+ inches)
2009/06/24 Rainbow - Troutlodge Triploid 3,036 Catchable (6+ inches)
2008/06/23 Rainbow - Troutlodge Triploid 3,640 Catchable (6+ inches)
2008/05/20 Rainbow - Troutlodge Triploid 1,501 Catchable (6+ inches)
2007/07/06 Rainbow - Troutlodge Triploid 1,500 Catchable (6+ inches)
2007/06/21 Rainbow - Troutlodge Triploid 1,496 Catchable (6+ inches)
2007/06/01 Rainbow - Troutlodge Triploid 1,615 Catchable (6+ inches)
2006/10/13 Rainbow - Troutlodge Triploid 900 Catchable (6+ inches)
2006/07/14 Rainbow - Troutlodge Triploid 1,530 Catchable (6+ inches)
2006/06/20 Rainbow - Troutlodge Triploid 1,520 Catchable (6+ inches)
2006/05/24 Rainbow - Troutlodge Triploid 1,523 Catchable (6+ inches)
2005/07/14 Hayspur Kamloops Triploid 1,530 Catchable (6+ inches)
2005/06/13 Rainbow - Hayspur Triploid 1,500 Catchable (6+ inches)
2005/05/31 Rainbow - Hayspur Triploid 1,530 Catchable (6+ inches)
2004/07/20 Rainbow - Hayspur Triploid 1,553 Catchable (6+ inches)
2004/06/29 Rainbow - Hayspur Triploid 1,575 Catchable (6+ inches)
2004/06/17 Rainbow - Hayspur Triploid 1,450 Catchable (6+ inches)
2003/10/24 Rainbow - Hayspur Triploid 1,020 Catchable (6+ inches)
2003/07/15 Rainbow - Hayspur Triploid 1,560 Catchable (6+ inches)
2003/06/23 Rainbow - Hayspur Triploid 1,520 Catchable (6+ inches)
2003/05/27 Rainbow - Hayspur Triploid 1,503 Catchable (6+ inches)
2002/10/17 Arlee Rainbow 2,080 Catchable (6+ inches)
2002/09/27 Arlee Rainbow 1,008 Catchable (6+ inches)
2002/07/16 Arlee Rainbow 1,500 Catchable (6+ inches)
2002/06/18 Arlee Rainbow 1,500 Catchable (6+ inches)
2002/05/30 Arlee Rainbow 1,575 Catchable (6+ inches)
2001/10/02 Arlee Rainbow 1,680 Catchable (6+ inches)
2001/07/03 Arlee Rainbow 1,499 Catchable (6+ inches)
2001/06/07 Arlee Rainbow 1,559 Catchable (6+ inches)
2001/05/14 Arlee Rainbow 1,520 Catchable (6+ inches)
2000/07/17 Arlee Rainbow 1,200 Catchable (6+ inches)
2000/06/12 Arlee Rainbow 1,500 Catchable (6+ inches)
2000/06/05 Steelhead B-Run 400 Catchable (6+ inches)
2000/05/23 Arlee Rainbow 1,500 Catchable (6+ inches)
1999/08/23 Domestic Kamloops 5,500 Fry (0-3 inches)
1999/07/12 Arlee Rainbow 598 Catchable (6+ inches)
1999/06/30 Rainbow - Hayspur Diploid 11,948 Fingerling (3-6 inches)
1999/06/16 Arlee Rainbow 935 Catchable (6+ inches)
1999/06/08 Steelhead A-Run 1,570 Catchable (6+ inches)
1999/06/08 Steelhead B-Run 4,500 Fingerling (3-6 inches)
1999/05/27 Arlee Rainbow 1,275 Catchable (6+ inches)
1998/09/01 Rainbow - Hayspur Diploid 2,725 Fingerling (3-6 inches)
1998/08/27 Colorado River Rainbow 1,396 Catchable (6+ inches)
1998/08/12 Rainbow - Hayspur Diploid 5,069 Fingerling (3-6 inches)
1998/07/06 Arlee Rainbow 1,500 Catchable (6+ inches)
1998/05/28 Arlee Rainbow 3,033 Catchable (6+ inches)
1998/05/19 Steelhead A-Run 3,000 Catchable (6+ inches)
1997/10/03 Rainbow - Hayspur Diploid 2,700 Catchable (6+ inches)
1997/07/14 Rainbow - Hayspur Diploid 1,740 Catchable (6+ inches)
1997/06/27 Rainbow - Hayspur Diploid 10,175 Fingerling (3-6 inches)
1997/06/17 Rainbow - Hayspur Diploid 1,500 Catchable (6+ inches)
1997/05/23 Rainbow - Hayspur Diploid 1,551 Catchable (6+ inches)
1996/10/03 Rainbow - Hayspur Diploid 1,000 Catchable (6+ inches)
1996/07/16 Rainbow - Hayspur Diploid 1,500 Catchable (6+ inches)
1996/06/19 Rainbow - Hayspur Diploid 10,008 Fingerling (3-6 inches)
1996/06/18 Rainbow - Hayspur Diploid 1,500 Catchable (6+ inches)
1996/06/10 Rainbow - Hayspur Diploid 1,550 Catchable (6+ inches)
1995/09/21 Arlee Rainbow 2,000 Catchable (6+ inches)
1995/09/19 Colorado River Rainbow 950 Adults
1995/07/18 Arlee Rainbow 1,560 Catchable (6+ inches)
1995/06/21 Colorado River Rainbow 900 Adults
1995/06/14 Rainbow Unspecified 10,000 Fingerling (3-6 inches)
1995/06/12 Arlee Rainbow 1,582 Catchable (6+ inches)
1995/05/24 Arlee Rainbow 1,561 Catchable (6+ inches)
1994/10/11 Rainbow - Hayspur Diploid 16,832 Catchable (6+ inches)
1994/09/14 Rainbow - Hayspur Diploid 1,000 Catchable (6+ inches)
1994/06/06 Arlee Rainbow 2,062 Catchable (6+ inches)
1994/05/27 Rainbow - Hayspur Diploid 1,000 Catchable (6+ inches)
1994/05/19 Rainbow - Hayspur Diploid 7,500 Fingerling (3-6 inches)
1993/08/05 Bull Trout 416 Catchable (6+ inches)
1993/05/24 Arlee Rainbow 2,000 Catchable (6+ inches)
1992/05/26 Arlee Rainbow 2,200 Catchable (6+ inches)
1991/06/13 Arlee Rainbow 2,100 Catchable (6+ inches)
1990/06/09 Mt Shasta Rainbow 1,000 Catchable (6+ inches)
1990/05/16 Mt Shasta Rainbow 1,000 Catchable (6+ inches)
1989/06/08 Mt Shasta Rainbow 1,980 Catchable (6+ inches)
1989/05/23 Mt Shasta Rainbow 2,100 Catchable (6+ inches)
1988/05/25 Rainbow Unspecified 1,980 Catchable (6+ inches)
1987/05/15 Mt Shasta Rainbow 2,160 Catchable (6+ inches)
1986/05/19 Mt Lassen Rainbow 2,023 Catchable (6+ inches)
1985/05/17 Rainbow Unspecified 2,010 Catchable (6+ inches)
1984/06/14 Rainbow Unspecified 870 Catchable (6+ inches)
1984/05/23 Rainbow Unspecified 1,260 Catchable (6+ inches)
1983/06/08 Rainbow Unspecified 2,004 Catchable (6+ inches)
1982/07/20 Rainbow Unspecified 2,268 Catchable (6+ inches)
1982/06/10 Rainbow Unspecified 2,795 Catchable (6+ inches)
1981/06/02 Rainbow Unspecified 2,040 Catchable (6+ inches)
1980/05/20 Rainbow Unspecified 3,200 Catchable (6+ inches)
1979/09/08 Rainbow Unspecified 4,001 Fry (0-3 inches)
1979/07/27 Rainbow Unspecified 1,600 Catchable (6+ inches)
1979/07/27 Rainbow Unspecified 8,220 Fry (0-3 inches)
1979/06/06 Rainbow Unspecified 1,440 Catchable (6+ inches)
1978/06/14 Rainbow Unspecified 3,190 Catchable (6+ inches)
1977/06/28 Rainbow Unspecified 2,600 Catchable (6+ inches)
1977/06/27 Rainbow Unspecified 480 Catchable (6+ inches)
1976/05/27 Rainbow Unspecified 5,080 Catchable (6+ inches)
1975/06/12 Rainbow Unspecified 5,070 Catchable (6+ inches)
1974/05/22 Rainbow Unspecified 2,160 Catchable (6+ inches)
1972/06/06 Rainbow Unspecified 4,840 Catchable (6+ inches)
1971/05/26 Rainbow Unspecified 5,000 Catchable (6+ inches)
1970/06/01 Rainbow Unspecified 5,040 Catchable (6+ inches)
1969/05/22 Rainbow Unspecified 5,015 Catchable (6+ inches)
1968/05/22 Rainbow Unspecified 5,130 Catchable (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

No Special Rules for Mosquito Flat Reservoir.
Salmon Region Bag Limits
Bass (Largemouth and Smallmouth)

  • No bag, size or possession limits

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 25

Salmon

  • Spring and summer Chinook Salmon seasons and limits are set by the Idaho Fish and Game Commission and issued in separate brochures
  • Seasons and limits for fall Chinook Salmon and Coho Salmon can be found here
  • Sockeye Salmon limit is 0 and fishing for or targeting Sockeye Salmon is illegal
  • Fishing for or targeting salmon is prohibited unless a salmon season is specifically opened for that water

Steelhead (ocean-going)

  • Defined as Rainbow Trout longer than twenty (20) inches in length in the Salmon River drainage (excluding the Lemhi and Pahsimeroi rivers, lakes and reservoirs, and ponds)
  • Fishing for or targeting steelhead is prohibited unless a steelhead season is specifically opened for that water (see fishing regulationsfor details)

Sturgeon

  • Sturgeon limit is 0, catch-and-release
  • Sturgeon must not be removed from the water and must be released upon landing
  • Barbless hooks 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

Tiger Muskie

  • Tiger Muskie limit is 2, none under 40 inches

Trout includes Lake Trout, Golden Trout, Arctic Grayling, Cutthroat Trout, Rainbow Trout, Sunapee Trout and trout hybrids (e.g. Tiger Trout)

  • Trout limit is 6, all species combined
  • Chinook Salmon and steelhead placed in ponds are counted in the trout bag limit
  • Does not include Bull Trout and Brook Trout which are listed separately

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 including Pacific Lamprey

  • May not be harvested or possessed

All Other Fish Species includes bullfrogs and crayfish

  • No bag, size or possession limit
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