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37-acre lake near Larimer County. The lake tops out around 33 ft. These contours are modeled — built from the real shoreline and the water's maximum depth — so read them as a guide, never as navigation. Here's the year, species by species, as the scoring engine sees it.
Traced from the shoreline, Marys Lake runs 39 acres with 1.1 miles of edge. At index 1.2 the outline is almost a bowl — read the depth changes, not the shoreline. The shallow band under 15 ft claims about 35% of the surface on the model — that's where the groceries are. Call it 0.4 mi long by 0.2 mi wide at the broadest reach. You'll find it in Larimer County. For a second option, Estes Lake lies 3 mi northeast.
In spring, brook trout run shallow here, mostly 2 to 15 ft. Summer pushes them deeper, 10 to 30 ft, and winter fish settle into 3 to 20 ft. Deep basin is the standout, a deep basin at roughly 28 ft, rated prime for summer brook trout. Time it for early morning and the evening. You won't need more than a small spoon fished deep or a trolled lake-clear wobbler + worm most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 15 ft | dawn & dusk | Main-lake point (8 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 10 to 30 ft | dawn & dusk | Deep basin (28 ft) | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 15 ft | midday & dawn | Main-lake point (8 ft) | Small spoon (orange), Spinner |
| Winter | 3 to 20 ft | dawn | Break off the point (15 ft) | Small jigging spoon, Tungsten jig + plastic |
Come spring, look for brown trout tight to the bank in 3 to 25 ft. Expect a summer slide to 10 to 33 ft, then a winter hold in 5 to 33 ft. Start at Break off the point. It's a drop-off holding about 15 ft of water and rates prime come summer. Prime time lands in after dark and early morning. A spoon at the thermocline or a deep stickbait (night) is the honest summer answer here.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 25 ft | dawn & dusk | Main-lake point (8 ft) | Stickbait off planer boards (shallow), Small spoon along mud lines |
| Summer | 10 to 33 ft | night & dawn | Break off the point (15 ft) | Spoon at the thermocline, Deep stickbait (night) |
| Fall | 5 to 30 ft | dusk & dawn | Main-lake point (8 ft) | Jerkbait over gravel, Casting spoon |
| Winter | 5 to 33 ft | dawn | Break off the point (15 ft) | Jigging spoon, Small stickbait (slow) |
Spring puts rainbow trout in skinny water — 5 to 20 ft is the zone. As the season builds they drop to 8 to 30 ft, wintering in 7 to 33 ft. Winter rainbow trout concentrate at Break off the point, a prime-rated drop-off around 15 ft. Warm-month bites cluster around early morning and the evening. A dodger + spoon (deep troll) or a flutter spoon covers the summer program.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 20 ft | dawn & dusk | Main-lake point (8 ft) | Inline spinner (silver), Small spoon |
| Summer | 8 to 30 ft | dawn & dusk | Break off the point (15 ft) | Dodger + spoon (deep troll), Flutter spoon |
| Fall | 9 to 33 ft | dawn & dusk | Main-lake point (8 ft) | Casting spoon, Jerkbait over shoals |
| Winter | 7 to 33 ft | dawn | Break off the point (15 ft) | Jigging spoon, Tube jig (white) |
Structure-wise the chart holds 4 features, led in depth by Deep basin at roughly 28 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 Marys Lake specifically, so confirm the current rules before you fish.
Check the official Colorado fishing regulations →
Marys Lake is about 33 ft (10 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 brook trout, brown trout, rainbow trout on Marys Lake.
Break off the point is the top-rated area: a drop-off in about 15 ft of water that rates prime for brown trout in summer. The map above holds the full rated-spot list for every species and season.
For brook 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 Marys 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.
Estes Lake 3 mi · Button Rock Res 12 mi · Grand Lake 16 mi · Carter Lake 17 mi · Shadow Mountain Reservoir 18 mi · Monarch Lake 20 mi · Lon Hagler Reservoir 20 mi · Granby Reservoir 20 mi · Meadow Creek Reservoir 23 mi · Horsetooth Reservoir 24 mi · Boulder City Reservoir 25 mi · Diamond Lake Upper 25 mi
See how Marys Lake stacks up: best rainbow trout lakes in Colorado · best brown trout lakes in Colorado · best brook trout lakes in Colorado
More water nearby: Larimer County fishing maps (6 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.