Mystery Lake #1

Flows into the Mystery Creek

  • Recommended Fishing Water

Mystery Lake #1 in Custer County is 5.8 acres.

Interactive Map
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Directions

West of Bonanza, Idaho along Jordan Creek road to Loon Creek road to Mystery Creek, follow primitive trail along Mystery Creek, and approximately 2 mile or 3 kilometer hike to Mystery Lakes.

Recommended Game Fish

Species Observed in Surveys

Fish Stocking Records

Date Species Quantity General Size
2013/09/09 Golden Trout 515 Fry (0-3 inches)
2001/09/14 Golden Trout 400 Fry (0-3 inches)
1999/08/19 Golden Trout 300 Fry (0-3 inches)
1996/09/03 Golden Trout 500 Fry (0-3 inches)
1984/09/02 Cutthroat Trout - Yellowstone 500 Fry (0-3 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

No Special Rules for Mystery Lake #1.
Salmon Region Bag Limits
Bass (Largemouth and Smallmouth)

  • No bag, length, 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 apply when fishing for Brook Trout

Bull Trout

  • Bull Trout - catch-and-release

Kokanee

  • Kokanee limit is 25

Salmon (ocean-run)

  • 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 fishing is illegal. Defined as ocean-run Oncorhynchus nerka longer than 14 inches in the Salmon River drainage (excluding above Mosquito Flat Dam)
  • Fishing for salmon is prohibited unless a salmon season is specifically opened for that water

Steelhead (ocean-run)

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

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 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
  • Bull Trout and Brook Trout 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 apply 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, length, or possession limits
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