Swan Falls Reservoir

Flows into the Snake River

  • Recommended Fishing Water

Swan Falls Reservoir in Ada and Owyhee Counties is 470.3 acres.

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Swan Falls Reservoir offers fishing opportunity is a unique canyonlands environment. Most anglers target smallmouth bass via boat. Most facilities are managed by Idaho Power Corporation.

Facilities

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

Recommended Game Fish

Species Observed in Surveys

Fish Stocking Records

Date Species Quantity General Size
2016/10/13 White Sturgeon 104 Adults
2014/10/07 Rainbow Trout - Triploid 53,506 Catchable (6+ inches)
2014/04/03 White Sturgeon 153 Catchable (6+ inches)
1982/01/19 Rainbow Trout 1,292 Adults
1981/12/09 Rainbow Trout 1,000 Catchable (6+ inches)
1981/11/02 Rainbow Trout 1,000 Catchable (6+ inches)
1981/10/02 Rainbow Trout 1,000 Catchable (6+ inches)
1981/01/13 Rainbow Trout 1,588 Catchable (6+ inches)
1980/12/09 Rainbow Trout 1,628 Catchable (6+ inches)
1980/10/17 Rainbow Trout 1,085 Catchable (6+ inches)
1980/02/15 Rainbow Trout 800 Catchable (6+ inches)
1980/01/17 Rainbow Trout 1,600 Catchable (6+ inches)
1979/01/26 Rainbow Trout 3,450 Adults
1979/01/19 Rainbow Trout 3,190 Adults
1978/12/19 Rainbow Trout 1,680 Catchable (6+ inches)
1978/10/24 Rainbow Trout 800 Catchable (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

No Special Rules for Swan Falls Reservoir.
Southwest 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

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 Snake River drainage below Hells Canyon Dam, 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 lakes and reservoirs). Between Hells Canyon Dam and Oxbow Dam and the Boise River from its mouth upstream to Barber Dam during steelhead seasons, steelhead are Rainbow Trout over 20 inches with the adipose fin clipped (as evidenced by a healed scar)
  • 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 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
  • Chinook Salmon and steelhead placed in ponds are counted in the trout bag limit
  • Bull Trout and Brook Trout are listed separately

Walleye (Stocked illegally in this Region. May be harmful to existing fisheries.)

  • No bag, length, or possession limits. Harvest is encouraged

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 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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