Last stocked
May 1, 2026
Plants on record
31
Since 2020
Species recorded
3
Average size
6.1 in
Elevation
4,726 ft
Access and facts
- Water type
- reservoir
- Nearest town
- Shoshoni, WY
- Shore access
- Yes
- Boat ramp
- Yes
- ADA accessible
- Yes
- Fee required
- Yes
- Facilities
- restrooms, camping
Boysen State Park, 10 miles north of Shoshoni on US 20. About 19,560 surface acres and 76 miles of shoreline, with accessible restrooms, accessible boat ramps, six campgrounds, and good access via shoreline roads.
Sources: water_type , access.boat_ramp , access.ada , access.fee , access.shore , shore_notes , nearest_town , facilities , fishing_notes , fishing_notes , watch_outs
How Boysen Reservoir is stocked
The first plant of the year usually falls in the first week of May. In 2026 it was May 1, 2026, about when it usually is.
Badwater Creek (4.1 mi) and Ocean Lake (22.9 mi) were stocked more recently.
Fish at Boysen Reservoir
Fishing Boysen Reservoir is most likely to be for Rainbow Trout. Rainbow Trout accounts for 18 of 31 plants on record, ahead of Kokanee Salmon and one more.
Rainbow Trout 18 plants
- Plants
- 18 of 31
- Last stocked
- October 1, 2025
- Average length
- 7.8 in
Kokanee Salmon 8 plants
- Plants
- 8 of 31
- Last stocked
- May 1, 2026
- Average length
- 3.9 in
Cutthroat Trout 5 plants
- Plants
- 5 of 31
- Last stocked
- October 1, 2023
- Average length
- 3.3 in
Fishing Boysen Reservoir
Boysen Reservoir is a popular sporting area with fishing available year-round. Anglers can find numerous species of fish, including walleye, perch, crappie, channel catfish, rainbow trout, brown trout, and ling. The reservoir spans approximately 20,000 surface acres and offers good access through shoreline roads and boat ramps.
Sources: en.wikipedia.org , usbr.gov
What to watch for
Anglers should be aware that Boysen Reservoir experiences a cold-semi arid climate. This region has vast temperature differences throughout the year, with summers averaging highs in the low 90s and winters averaging lows in the single digits.
Fish stocked per year
- 110,6372020
- 194,0882021
- 205,1442022
- 238,9632023
- 179,8912024
- 169,4482025
- 59,9992026
Stocking history
Showing 15 of 31 plants Showing 31 plants
| Date | Species | Quantity | Avg. length | Source |
|---|---|---|---|---|
| May 1, 2026 | Kokanee Salmon | 59,999 | 2.8 in | report |
| October 1, 2025 | Rainbow Trout | 89,201 | 7.6 in | report |
| October 1, 2025 | Rainbow Trout | 20,761 | 9.1 in | report |
| May 1, 2025 | Kokanee Salmon | 59,486 | 2.5 in | report |
| December 1, 2024 | Kokanee Salmon | 2,600 | 9.5 in | report |
| October 1, 2024 | Rainbow Trout | 63,879 | 8.1 in | report |
| October 1, 2024 | Rainbow Trout | 43,285 | 8 in | report |
| May 1, 2024 | Kokanee Salmon | 70,127 | 2.4 in | report |
| October 1, 2023 | Rainbow Trout | 494 | 7.5 in | report |
| October 1, 2023 | Cutthroat Trout | 24,750 | 3.9 in | report |
| September 1, 2023 | Rainbow Trout | 29,730 | 8.6 in | report |
| September 1, 2023 | Rainbow Trout | 75,804 | 6.9 in | report |
| August 1, 2023 | Rainbow Trout | 5,006 | 6.3 in | report |
| May 1, 2023 | Kokanee Salmon | 103,179 | 3.1 in | report |
| November 1, 2022 | Rainbow Trout | 40,575 | 8.1 in | report |
| November 1, 2022 | Rainbow Trout | 9,990 | 2.8 in | report |
| November 1, 2022 | Cutthroat Trout | 23,375 | 2.8 in | report |
| October 1, 2022 | Rainbow Trout | 31,201 | 7.3 in | report |
| October 1, 2022 | Cutthroat Trout | 11,024 | 4.2 in | report |
| September 1, 2022 | Rainbow Trout | 5,344 | 8.4 in | report |
| September 1, 2022 | Rainbow Trout | 54,835 | 8.3 in | report |
| July 1, 2022 | Kokanee Salmon | 28,800 | 3.8 in | report |
| November 1, 2021 | Rainbow Trout | 14,935 | 8.4 in | report |
| October 1, 2021 | Rainbow Trout | 28,771 | 8.5 in | report |
| October 1, 2021 | Rainbow Trout | 75,182 | 8.4 in | report |
| September 1, 2021 | Cutthroat Trout | 30,079 | 2.3 in | report |
| May 1, 2021 | Kokanee Salmon | 31,401 | 4.1 in | report |
| April 1, 2021 | Kokanee Salmon | 13,720 | 3.3 in | report |
| October 1, 2020 | Rainbow Trout | 23,560 | 8.8 in | report |
| October 1, 2020 | Rainbow Trout | 64,363 | 8.7 in | report |
| October 1, 2020 | Cutthroat Trout | 22,714 | 3.3 in | report |
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Species stocked here
Depth-by-season, top lures, and bait notes for each species stocked here are on its own species guide, linked above.