Redrock Lake Depth Map & Fishing Spots (MT)

Target species

Species estimated from nearby surveyed lakes. No fish-species survey is on record for this water, so these species aren't a confirmed catch list. They're an informed estimate: the species listed for the nearest surveyed lakes in the same region, kept only where they fit this lake's depth and habitat. Treat them as what's likely present. (The depth chart itself is real surveyed bathymetry.) How we estimate species →

Hatch outlook

Grasshoppers (east-side summer)Active window

Typical here: Jul 1 – Oct 15 · until the hard frosts of mid-October; on the Missouri, August hoppers fish mid-river, not the banks

adultall day in high summer, best when afternoon wind knocks bugs onto the water

Pulls fish to the windward grassy banks and edges for months — fish the bank the wind blows ONTO.

The friendliest crossover of the summer: on lakes, drift the windward bank with a bubble-and-foam-hopper — the bubble's splash doesn't hurt a hopper presentation. On rivers, the same rig dead-drifted along the undercut grass banks, or small gold spinners under the banks between rises.

The event happens over grassy banks, undercut edges and windward shorelines

Spruce MothActive window

Typical here: Jul 20 – Aug 31 · a conifer-forest event — it needs fir and lodgepole on the banks, so it's a Rock Creek / Blackfoot / upper Bitterroot specialty

adultmorning through midday — moths don't enter the water willingly — landings are sporadic and near the conifer banks; fish the imitation LOW in the film with minimal floatant, even fully drowned, with a little movement

When the moths show, just about every run produces — large trout key on them so hard that one pattern carries the whole box for two weeks.

Honest limit: a small drowned-surface moth has no lure analog. The workable rig is a casting bubble with a drowned moth pattern along the timbered banks in the morning; otherwise fish spinners early and late and leave the moth window to the film.

2–3 weeks at best, and day-to-day — fish key on the moths when they show and vanish with them

The event happens over banks under conifers — the moths rarely reach mid-river

Recommendations come from depth structure and seasonal species behavior. Treat them as a starting point, not a guarantee. Contours here are interpolated from real agency depth surveys (state DNR / USACE). Never use for navigation. Always check local regulations.

Loading depth chart…

Recent catches at Redrock Lake

Shared by DepthScout anglers. Exact spots stay private, always.

No shared catches here yet — be the first.Log a catch from the map above and share it to put Redrock Lake on the board.

Fishing Redrock Lake: what the data says

29-acre lake in Glacier County, Montana. The lake tops out around 21 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. Every species below gets its seasonal read from the same numbers driving the chart.

The outline encloses 28 acres, worked by 1 miles of shoreline. At index 1.4 the outline is almost a bowl — read the depth changes, not the shoreline. Littoral water — the productive band under ~15 ft — makes up 76% of this chart. Tip to tip the water measures near 0.4 mi with a 0.2-mi widest point. It sits in Glacier County. Lake Sherburne sits 6 mi east — the closest neighbouring chart.

Rainbow Trout fishing at Redrock Lake

Come spring, look for rainbow trout tight to the bank in 5 to 20 ft. Expect a summer slide to 6 to 21 ft, then a winter hold in 4 to 21 ft. Start at Break off the point. It's a drop-off holding about 17 ft of water and rates prime come winter. Prime time lands in early morning and the evening. A dodger + spoon (deep troll) or a flutter spoon is the honest summer answer here.

Season	Depth	Best window	Start at	Go-to baits
Spring	5 to 20 ft	dawn & dusk	Main-lake point (7 ft)	Inline spinner (silver), Small spoon
Summer	6 to 21 ft	dawn & dusk	Break off the point (17 ft)	Dodger + spoon (deep troll), Flutter spoon
Fall	6 to 21 ft	dawn & dusk	Main-lake point (7 ft)	Casting spoon, Jerkbait over shoals
Winter	4 to 21 ft	dawn	Break off the point (17 ft)	Jigging spoon, Tube jig (white)

Walleye fishing at Redrock Lake

Start shallow in spring: walleye sit in 4 to 15 ft that time of year. Warm water sends them out to 6 to 21 ft; cold water stacks them in 6 to 21 ft. Top water on the chart: Break off the point, a drop-off in the 17 ft range, prime in fall. Fish it in the evening and early morning and you'll meet the bite. Throw a crawler harness on bottom bouncer or a deep crankbait (trolled) until the fish tell you otherwise.

Season	Depth	Best window	Start at	Go-to baits
Spring	4 to 15 ft	dusk & dawn	Main-lake point (7 ft)	1/8 oz jig + minnow, Hair jig
Summer	6 to 21 ft	dusk & dawn	Break off the point (17 ft)	Crawler harness on bottom bouncer, Deep crankbait (trolled)
Fall	6 to 21 ft	dusk & night	Break off the point (17 ft)	Jigging rap, Jig + big minnow
Winter	6 to 21 ft	dusk & dawn	Deep basin (20 ft)	Jigging spoon + minnow head, Rattle bait

Yellow Perch fishing at Redrock Lake

Spring puts yellow perch in skinny water — 3 to 12 ft is the zone. Warm water sends them out to 6 to 21 ft; cold water stacks them in 6 to 21 ft. Deep basin is the standout, a deep basin at roughly 20 ft, rated prime for fall yellow perch. Plan around early morning in the warm months. A drop-shot micro plastics or a small spoon tipped with worm covers the summer program.

Season	Depth	Best window	Start at	Go-to baits
Spring	3 to 12 ft	midday & dawn	Shallow bay flat (2 ft)	Small jig + curly tail, Perch-pattern micro crank
Summer	6 to 21 ft	dawn	Deep basin (20 ft)	Drop-shot micro plastics, Small spoon tipped with worm
Fall	6 to 21 ft	midday	Deep basin (20 ft)	Jigging spoon (small), Perch rig / spreader
Winter	6 to 21 ft	midday & dawn	Deep basin (20 ft)	Tungsten jig + spikes, Rattle spoon (small)

Northern Pike fishing at Redrock Lake

Spring northern pike on Redrock Lake hold shallow, usually 2 to 8 ft. They move out to 8 to 20 ft in summer and finish the year down in 5 to 15 ft. Put Shallow bay flat first on the milk run — a weed flat near 2 ft that grades prime for spring. The feeding windows run early morning and the evening. The summer box starts with a bucktail or a weedless spoon over cabbage.

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	8 to 20 ft	dawn & dusk	Break off the point (17 ft)	Bucktail, Weedless spoon over cabbage
Fall	6 to 18 ft	midday & dawn	Break off the point (17 ft)	Big rubber (Bull Dawg style), Husky-style jerkbait
Winter	5 to 15 ft	midday	Main-lake point (7 ft)	Tip-ups, Large jigging spoon

Smallmouth Bass fishing at Redrock Lake

Spring smallmouth bass on Redrock Lake hold shallow, usually 3 to 12 ft. They move out to 6 to 21 ft in summer and finish the year down in 6 to 21 ft. Put Main-lake point first on the milk run — a point near 7 ft that grades prime for fall. The feeding windows run early morning and the evening. The summer box starts with a drop shot (goby/minnow) or a ned rig.

Season	Depth	Best window	Start at	Go-to baits
Spring	3 to 12 ft	dawn & dusk	Main-lake point (7 ft)	Ned rig, Tube jig
Summer	6 to 21 ft	dawn & dusk	Break off the point (17 ft)	Drop shot (goby/minnow), Ned rig
Fall	6 to 21 ft	midday & dawn	Main-lake point (7 ft)	Jerkbait, Blade bait
Winter	6 to 21 ft	midday	Break off the point (17 ft)	Blade bait, Hair jig

Crappie fishing at Redrock Lake

Spring crappie on Redrock Lake hold shallow, usually 2 to 8 ft. They move out to 6 to 21 ft in summer and finish the year down in 6 to 21 ft. Put Deep basin first on the milk run — a deep basin near 20 ft that grades prime for winter. The feeding windows run early morning and the evening. The summer box starts with a jig trolled/spider-rigged or a small crankbait (trolled).

Season	Depth	Best window	Start at	Go-to baits
Spring	2 to 8 ft	midday & dawn	Shallow bay flat (2 ft)	1/16 oz jig + tube, Curly-tail grub
Summer	6 to 21 ft	dawn & dusk	Break off the point (17 ft)	Jig trolled/spider-rigged, Small crankbait (trolled)
Fall	8 to 20 ft	dawn	Break off the point (17 ft)	Jig + minnow combo, Small swimbait (1.5-2")
Winter	6 to 21 ft	midday	Deep basin (20 ft)	Tungsten jig + soft plastic, Tiny jigging spoon

Redrock Lake also holds channel catfish (6 to 21 ft in summer). Pick any of them on the map above for rated spots and bait picks.

Notable structure

4 pieces of structure are mapped here — Deep basin, around 20 ft, is the deepest of them.

Deep basin: deep basin, around 20 ft
Break off the point: drop-off, around 17 ft
Main-lake point: point, around 7 ft
Shallow bay flat: weed flat, around 2 ft

Redrock Lake fishing regulations

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 Redrock Lake specifically, so confirm the current rules before you fish.

Check the official Montana fishing regulations →

Common questions

How deep is Redrock Lake?

Redrock Lake is about 21 ft (6 m) deep at its deepest point. The depth chart here comes from real state fisheries GPS surveys, so the contours reflect measured depths.

What fish are in Redrock Lake?

Anglers target rainbow trout, walleye, yellow perch, northern pike, smallmouth bass, crappie, channel catfish on Redrock Lake. This isn't a survey of the lake — none is on record for it — but an informed estimate from the species listed for the nearest surveyed lakes in the region, filtered to this lake's depth and habitat.

Where is the best fishing spot on Redrock Lake?

Break off the point is the top-rated area: a drop-off in about 17 ft of water that rates prime for walleye in fall. Every other rated spot, per species and season, is on the map above.

When is the best time to fish Redrock Lake?

For rainbow 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.

What are the fishing regulations for Redrock Lake?

Fishing on Redrock 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.

Nearby waters

Lake Sherburne 6 mi · Glenns Lake 8 mi · Camas Lake 9 mi · Evangeline Lake 10 mi · Gunsight Lake 12 mi · Lake McDonald 18 mi · Outpost Lake 19 mi, AB · Lake Wurdeman 19 mi · Payne Lake 22 mi, AB · Forum Lake 22 mi, BC · Wall Lake 23 mi, BC · Ashman Lake 26 mi, BC

See how Redrock Lake stacks up: best smallmouth bass lakes in Montana · best walleye lakes in Montana · best northern pike lakes in Montana · best crappie lakes in Montana

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.