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181-acre lake in Teton County, Montana. The lake tops out around 11 ft. The depth chart is built from real state fisheries GPS surveys, so the humps, channels and drop-offs you see are measured, not guessed. Species by species, here's what the data says the year looks like.
Split Rock Lake maps at 181 acres behind 2 miles of shoreline. At index 1.1 the outline is almost a bowl — read the depth changes, not the shoreline. The whole water is littoral — nothing here runs deeper than ~15 ft, so it's all weed-and-bait territory. End to end it runs roughly 0.6 mi, about 0.5 mi across. Teton County claims this one. If the bite dies, Pishkun Reservoir is 2 mi to the northeast.
Early season northern pike use the shallows, holding in 2 to 8 ft. Expect a summer slide to 3 to 11 ft, then a winter hold in 3 to 11 ft. Put Shallow bay flat first on the milk run — a weed flat near 2 ft that grades prime for spring. In summer the feeding windows fall in early morning and the evening. Tie on a bucktail or a weedless spoon over cabbage and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 8 ft | midday & dawn | Shallow bay flat (2 ft) | #5 inline spinner, Spoon (red/white) |
| Summer | 3 to 11 ft | dawn & dusk | Break off the point (6 ft) | Bucktail, Weedless spoon over cabbage |
| Fall | 3 to 11 ft | midday & dawn | Break off the point (6 ft) | Big rubber (Bull Dawg style), Husky-style jerkbait |
| Winter | 3 to 11 ft | midday | Shallow bay flat (2 ft) | Tip-ups, Large jigging spoon |
In spring, yellow perch run shallow here, mostly 3 to 11 ft. Summer keeps them at 3 to 11 ft, and they winter in 3 to 11 ft. Deep basin is the standout, a deep basin at roughly 11 ft, rated prime for fall yellow perch. Time it for early morning. You won't need more than a drop-shot micro plastics or a small spoon tipped with worm most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 11 ft | midday & dawn | Shallow bay flat (2 ft) | Small jig + curly tail, Perch-pattern micro crank |
| Summer | 3 to 11 ft | dawn | Deep basin (11 ft) | Drop-shot micro plastics, Small spoon tipped with worm |
| Fall | 3 to 11 ft | midday | Deep basin (11 ft) | Jigging spoon (small), Perch rig / spreader |
| Winter | 3 to 11 ft | midday & dawn | Deep basin (11 ft) | Tungsten jig + spikes, Rattle spoon (small) |
The chart marks 6 structure features on Split Rock Lake; the deepest is Deep basin at about 11 ft.
Season dates, license requirements, and size and bag limits for Montana waters are set by the Montana Fish, Wildlife & Parks — and special regulations can apply to Split Rock Lake specifically, so confirm the current rules before you fish.
Check the official Montana fishing regulations →
Split Rock Lake is about 11 ft (3 m) deep at its deepest point. The depth chart here comes from real state fisheries GPS surveys, so the contours reflect measured depths.
Anglers target northern pike, yellow perch on Split Rock Lake.
Shallow bay flat is the top-rated area: a weed flat in about 2 ft of water that rates prime for northern pike in spring. Scroll up to the map for the complete spot list by species and season.
For northern pike, 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 Split Rock Lake is regulated by the Montana Fish, Wildlife & Parks. Check the official Montana regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Pishkun Reservoir 2 mi · Tunnel Lake 4 mi · Willow Creek Reservoir 8 mi · Gibson Reservoir 14 mi · Ostle Reservoir 22 mi · Bean Lake 25 mi · Parker Lake 37 mi · Heart Lake (Lewis and Clark) 37 mi · Canyon Lake (Lewis and Clark) 40 mi · Camp Lake (Lewis and Clark) 41 mi · Lake Otatsy 41 mi · Lewis Pond South 42 mi
See how Split Rock Lake stacks up: best northern pike lakes in Montana · best yellow perch lakes in Montana
More water nearby: Teton County fishing maps (5 charts). Browse all Montana fishing maps or see every water on DepthScout. Bathymetry credit: state fisheries survey programs. 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.