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Fishing Groundhog Reservoir: what the data says
544-acre reservoir near Dolores County. The lake tops out around 90 ft. The contours are modeled from the water's real shoreline and maximum depth. Treat them as a rough guide, and never use them for navigation. What follows comes from the same scoring engine that paints the spots above.
Cutthroat Trout fishing at Groundhog Reservoir
Start shallow in spring: cutthroat trout sit in 3 to 15 ft that time of year. Summer pushes them deeper, 10 to 35 ft, and winter fish settle into 10 to 40 ft. Main-lake point is the standout, a point at roughly 23 ft, rated prime for fall cutthroat trout. Plan around early morning and the evening in the warm months. A trolled spoon (small) or a inline spinner covers the summer program.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 3 to 15 ft | dawn & dusk | Inline spinner (silver/gold), Small spoon |
| Summer | 10 to 35 ft | dawn & dusk | Trolled spoon (small), Inline spinner |
| Fall | 5 to 25 ft | dawn & dusk | Casting spoon, Inline spinner |
| Winter | 10 to 40 ft | dawn | Small jigging spoon, Marabou jig |
Rainbow Trout fishing at Groundhog Reservoir
Spring rainbow trout on Groundhog Reservoir hold shallow, usually 5 to 20 ft. By summer they slide out to 8 to 30 ft, and by winter most fish are in 8 to 40 ft. If you only fish one area, make it Break off the point: a drop-off around 41 ft that scores prime in winter. In summer the feeding windows fall in early morning and the evening. A dodger + spoon (deep troll) or a flutter spoon covers the summer program.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 5 to 20 ft | dawn & dusk | Inline spinner (silver), Small spoon |
| Summer | 8 to 30 ft | dawn & dusk | Dodger + spoon (deep troll), Flutter spoon |
| Fall | 10 to 35 ft | dawn & dusk | Casting spoon, Jerkbait over shoals |
| Winter | 8 to 40 ft | dawn | Jigging spoon, Tube jig (white) |
Notable structure
- Deep basin: deep basin, around 77 ft
- Break off the point: drop-off, around 41 ft
- Main-lake point: point, around 23 ft
- Secondary point: point, around 23 ft
- Shallow bay flat: weed flat, around 6 ft
- Back-bay flat: weed flat, around 6 ft
Common questions
How deep is Groundhog Reservoir?
Groundhog Reservoir is about 90 ft at its deepest point. The contours here are modeled from the water's real shape and maximum depth, so treat them as a rough guide.
What fish are in Groundhog Reservoir?
Anglers target rainbow trout, cutthroat trout on Groundhog Reservoir.
Where is the best fishing spot on Groundhog Reservoir?
Main-lake point is the top-rated area: a point in about 23 ft of water that rates prime for cutthroat trout in fall. Open the map above to see every rated spot for each species and season.
When is the best time to fish Groundhog Reservoir?
For cutthroat trout, the summer bite is best in early morning and the evening. Each species page section below lists the seasonal windows, and the map shows a live NOW badge when you're inside one.
Nearby waters
McPhee Reservoir · Puett Reservoir · Trout Lake · Andrews Lake · Lemon Reservoir · Silverjack Reservoir
See how Groundhog Reservoir stacks up: best rainbow trout lakes in Colorado · best cutthroat trout lakes in Colorado
Browse all Colorado fishing maps or every water on DepthScout. How we build these maps. For fishing guidance only, never navigation.