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15-acre lake near Cody Region. The lake tops out around 45 ft. The contours come from a model of the real basin shape and its known max depth. Read them as probabilities, not soundings, and keep them out of navigation decisions. Below is the species-by-species picture, pulled from the same data the map uses.
Drawn out, this is 15 acres of water rimmed by 0.9 miles of bank. The shoreline is moderately structured (index 1.7) — enough points and pockets to pattern. About 33% of the surface sits shallower than 15 ft on the modeled chart — that's the weed-and-bait zone. Call it 0.3 mi long by 0.2 mi wide at the broadest reach. You'll find it in Big Horn County. For a second option, Upper Rainbow Lake lies 0 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. Break off the point is the standout, a drop-off at roughly 20 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 (11 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 10 to 30 ft | dawn & dusk | Break off the point (20 ft) | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 15 ft | midday & dawn | Main-lake point (11 ft) | Small spoon (orange), Spinner |
| Winter | 3 to 20 ft | dawn | Break off the point (20 ft) | Small jigging spoon, Tungsten jig + plastic |
The chart marks 4 structure features on Lower Rainbow Lake; the deepest is Deep basin at about 38 ft.
Season dates, license requirements, and size and bag limits for Wyoming waters are set by the Wyoming Game and Fish Department — and special regulations can apply to Lower Rainbow Lake specifically, so confirm the current rules before you fish.
Check the official Wyoming fishing regulations →
Lower Rainbow Lake is about 45 ft (14 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 on Lower Rainbow Lake.
Break off the point is the top-rated area: a drop-off in about 20 ft of water that rates prime for brook trout in summer. Scroll up to the map for the complete spot list by 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 Lower Rainbow Lake is regulated by the Wyoming Game and Fish Department. Check the official Wyoming regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Upper Rainbow Lake 0 mi · Triangle Lake 1 mi · Lake Eunice 1 mi · Sheepherder Lake 1 mi · Cliff Lake 1 mi · Robin Lake 1 mi · Crater Lake 2 mi · Loomis Lake 2 mi · Crystal Lake 2 mi · Granite Lake 2 mi · Spear Lake 2 mi · Bard Lake 2 mi
See how Lower Rainbow Lake stacks up: best brook trout lakes in Wyoming
More water nearby: Big Horn County fishing maps (25 charts). Browse all Wyoming 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.