Sign inSign up free Sign inSign up free Sign inSign up freeShared by DepthScout anglers. Exact spots stay private, always.
6-acre lake near Boulder County. The lake tops out around 71 ft. This chart interpolates between a real shoreline and a known maximum depth. It will point you at likely water, but it is not a navigation product. The rest of this page walks each species through its year, using the map's own scoring.
Bob Lake maps at 6 acres behind 0.4 miles of shoreline. At index 1.1 the outline is almost a bowl — read the depth changes, not the shoreline. Roughly 12% of the water is 15 ft or less as modeled, the band where the food chain lives. It sits in Boulder County. If the bite dies, Woodland Lake is 1 mi to the east.
The spring pattern is a shallow one: cutthroat trout in 3 to 15 ft. Midsummer fish sit out in 10 to 35 ft before dropping to 10 to 40 ft for winter. The spot to know is Break off the point, a drop-off in about 32 ft of water that rates prime for cutthroat trout in summer. Plan around early morning and the evening in the warm months. Summer baits: a trolled spoon (small) or an inline spinner gets it done.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 15 ft | dawn & dusk | Main-lake point (18 ft) | Inline spinner (silver/gold), Small spoon |
| Summer | 10 to 35 ft | dawn & dusk | Break off the point (32 ft) | Trolled spoon (small), Inline spinner |
| Fall | 5 to 25 ft | dawn & dusk | Main-lake point (18 ft) | Casting spoon, Inline spinner |
| Winter | 10 to 40 ft | dawn | Break off the point (32 ft) | Small jigging spoon, Marabou jig |
Structure-wise the chart holds 3 features, led in depth by Deep basin at roughly 60 ft.
Season dates, license requirements, and size and bag limits for Colorado waters are set by the Colorado Parks & Wildlife — and special regulations can apply to Bob Lake specifically, so confirm the current rules before you fish.
Check the official Colorado fishing regulations →
Bob Lake is about 71 ft (22 m) deep 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.
Anglers target cutthroat trout on Bob Lake.
Break off the point is the top-rated area: a drop-off in about 32 ft of water that rates prime for cutthroat trout in summer. Every other rated spot, per species and season, is on the map above.
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.
Fishing on Bob Lake is regulated by the Colorado Parks & Wildlife. Check the official Colorado regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Woodland Lake 1 mi · Diamond Lake Upper 3 mi · Crater Lake #1, Upper 4 mi · Meadow Creek Reservoir 8 mi · Barker Reservoir 10 mi · Monarch Lake 11 mi · Granby Reservoir 16 mi · Gross Reservoir 17 mi · Willow Creek Reservoir 20 mi · Shadow Mountain Reservoir 21 mi · Grand Lake 21 mi · Chicago Lake Lower 23 mi
See how Bob Lake stacks up: best cutthroat trout lakes in Colorado
More water nearby: Boulder County fishing maps (8 charts). Browse all Colorado fishing maps or see every water on DepthScout. How we build these maps. Fish here with a sonar unit that logs? Send us your depth data and we'll improve this chart, credited to you. For fishing guidance only, never navigation.