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About this water
Yellowtail Afterbay Reservoir is a reservoir in Big Horn County, Montana. State records show it stocked 36 times between 2000 and 2026. The most-stocked species are rainbow trout, walleye and yellowstone cutthroat trout. 505,942 rainbow trout have gone in across 33 releases.
Stocking history
36 recorded stockings
| Date | Species | Number | Size | Hatchery |
|---|---|---|---|---|
| May 6, 2026 | Rainbow Trout · Arlee | 6,239 | 5.1" | Bluewater Springs Trout Hatchery |
| Apr 2, 2025 | Rainbow Trout · Arlee | 6,649 | 4.5" | Bluewater Springs Trout Hatchery |
| Apr 1, 2025 | Rainbow Trout · Arlee | 8,311 | 4.3" | Bluewater Springs Trout Hatchery |
| May 7, 2024 | Rainbow Trout · Arlee | 10,173 | 4.7" | Bluewater Springs Trout Hatchery |
| May 10, 2023 | Rainbow Trout · Arlee | 12,970 | 4.7" | Bluewater Springs Trout Hatchery |
| May 10, 2021 | Rainbow Trout · Arlee | 14,960 | 4.4" | Bluewater Springs Trout Hatchery |
| Aug 12, 2020 | Yellowstone Cutthroat Trout · Yellowstone Basin-Big Timber | 6,580 | 3.0" | Yellowstone River Trout Hatchery |
| May 13, 2020 | Rainbow Trout · Arlee | 18,166 | 4.2" | Bluewater Springs Trout Hatchery |
| May 15, 2019 | Rainbow Trout · Arlee | 20,880 | 4.6" | Bluewater Springs Trout Hatchery |
| May 7, 2018 | Rainbow Trout · Arlee | 23,582 | 4.1" | — |
| May 7, 2018 | Rainbow Trout · Arlee | 23,582 | 4.1" | Bluewater Springs Trout Hatchery |
| Oct 4, 2017 | Rainbow Trout · Gerrard | 952 | 5.4" | Bluewater Springs Trout Hatchery |
Showing the 12 most recent of 36. Stocking records for Yellowtail Afterbay Reservoir published by Montana Fish, Wildlife & Parks. Stocking does not guarantee fish are present. Check current regulations and access before you go. See the full Montana stocking report.
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