Tiber Reservoir Depth Map & Fishing Spots (MT)

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 Tiber Reservoir

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 Tiber Reservoir on the board.

Fishing Tiber Reservoir: what the data says

17,800-acre reservoir near Chester. The lake tops out around 110 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. Below is the species-by-species picture, pulled from the same data the map uses.

The drawn water covers 22,703 acres wrapped in 267.2 miles of bank, with 22 islands in the mix. That shoreline is heavily fingered (development index 12.7) — bays, points and pockets everywhere, which multiplies the fishable edge. 64% of the surface is littoral (under ~15 ft) — cover, weeds and forage water. Figure 26.5 mi of water from one end to the other, 10.3 mi at the beam. Toole County claims this one. Lake Frances sits 49 mi west — the closest neighbouring chart.

Walleye fishing at Tiber Reservoir

The spring pattern is a shallow one: walleye in 4 to 15 ft. As the season builds they drop to 15 to 35 ft, wintering in 20 to 40 ft. Top water on the chart: Sharp break, a drop-off in the 22 ft range, prime in fall. Time it for the evening and early morning. Summer baits: a crawler harness on bottom bouncer or a deep crankbait (trolled) gets it done.

Season	Depth	Best window	Start at	Go-to baits
Spring	4 to 15 ft	dusk & dawn	Rock reef (12 ft)	1/8 oz jig + minnow, Hair jig
Summer	15 to 35 ft	dusk & dawn	Sharp break (22 ft)	Crawler harness on bottom bouncer, Deep crankbait (trolled)
Fall	12 to 40 ft	dusk & night	Sharp break (22 ft)	Jigging rap, Jig + big minnow
Winter	20 to 40 ft	dusk & dawn	Sharp break (22 ft)	Jigging spoon + minnow head, Rattle bait

Northern Pike fishing at Tiber Reservoir

Early season northern pike use the shallows, holding in 2 to 8 ft. Expect a summer slide to 8 to 20 ft, then a winter hold in 5 to 15 ft. Put Weed flat first on the milk run — a weed flat near 7 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	Weed flat (7 ft)	#5 inline spinner, Spoon (red/white)
Summer	8 to 20 ft	dawn & dusk	Weed flat (7 ft)	Bucktail, Weedless spoon over cabbage
Fall	6 to 18 ft	midday & dawn	Weed flat (7 ft)	Big rubber (Bull Dawg style), Husky-style jerkbait
Winter	5 to 15 ft	midday	Weed flat (7 ft)	Tip-ups, Large jigging spoon

Yellow Perch fishing at Tiber Reservoir

In spring, yellow perch run shallow here, mostly 3 to 12 ft. Summer pushes them deeper, 10 to 30 ft, and winter fish settle into 15 to 35 ft. Weed flat is the standout, a weed flat at roughly 7 ft, rated prime for spring 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 12 ft	midday & dawn	Weed flat (7 ft)	Small jig + curly tail, Perch-pattern micro crank
Summer	10 to 30 ft	dawn	Sharp break (22 ft)	Drop-shot micro plastics, Small spoon tipped with worm
Fall	12 to 35 ft	midday	Sharp break (22 ft)	Jigging spoon (small), Perch rig / spreader
Winter	15 to 35 ft	midday & dawn	Sharp break (22 ft)	Tungsten jig + spikes, Rattle spoon (small)

Rainbow Trout fishing at Tiber Reservoir

When the water first warms, rainbow trout slide up into 5 to 20 ft. Summer is an 8 to 30 ft game here, winter an 8 to 40 ft one. Start at Rock reef. It's a rock pile holding about 12 ft of water and rates prime come fall. The feeding windows run early morning and the evening. Keep a dodger + spoon (deep troll) or a flutter spoon rigged through the warm months.

Season	Depth	Best window	Start at	Go-to baits
Spring	5 to 20 ft	dawn & dusk	Shoreline point (5 ft)	Inline spinner (silver), Small spoon
Summer	8 to 30 ft	dawn & dusk	Rock reef (12 ft)	Dodger + spoon (deep troll), Flutter spoon
Fall	10 to 35 ft	dawn & dusk	Rock reef (12 ft)	Casting spoon, Jerkbait over shoals
Winter	8 to 40 ft	dawn	Sharp break (22 ft)	Jigging spoon, Tube jig (white)

Sauger fishing at Tiber Reservoir

The spring pattern is a shallow one: sauger in 4 to 18 ft. Midsummer fish sit out in 10 to 30 ft before dropping to 15 to 45 ft for winter. The spot to know is Rock reef, a rock pile in about 12 ft of water that rates prime for sauger in spring. Plan around early morning and the evening in the warm months. Summer baits: a bottom bouncer + crawler or a 3-way rig with stickbait gets it done.

Season	Depth	Best window	Start at	Go-to baits
Spring	4 to 18 ft	dawn & dusk	Rock reef (12 ft)	3/8 oz jig + ringworm, Hair jig + minnow
Summer	10 to 30 ft	dawn & dusk	Sharp break (22 ft)	Bottom bouncer + crawler, 3-way rig with stickbait
Fall	12 to 35 ft	dusk & dawn	Sharp break (22 ft)	Jig + big minnow, Blade bait
Winter	15 to 45 ft	dusk	Sharp break (22 ft)	Heavy jigging spoon, Jig + minnow (vertical)

Notable structure

Tiber Reservoir carries 16 mapped structure features, topping out (or rather bottoming out) at Deep basin, about 91 ft down.

Deep basin: deep basin, around 91 ft
Break off the point: drop-off, around 73 ft
Shallow feeding flat: feeding flat, around 25 ft
Sharp break: drop-off, around 22 ft
Shallow feeding flat: feeding flat, around 13 ft
Rock reef: rock pile, around 12 ft
Weed flat: weed flat, around 7 ft
Shoreline point: point, around 6 ft
Shoreline point: point, around 5 ft
Shallow flat: weed flat, around 5 ft
Shallow flat: weed flat, around 4 ft
Shoreline point: point, around 3 ft
Main-lake point: point, around 1 ft
Secondary point: point, around 1 ft

Tiber Reservoir 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 Tiber Reservoir specifically, so confirm the current rules before you fish.

Check the official Montana fishing regulations →

Common questions

How deep is Tiber Reservoir?

Tiber Reservoir is about 110 ft (34 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 Tiber Reservoir?

Anglers target walleye, northern pike, yellow perch, rainbow trout, sauger on Tiber Reservoir.

Where is the best fishing spot on Tiber Reservoir?

Sharp break is the top-rated area: a drop-off in about 22 ft of water that rates prime for walleye in fall. The interactive chart above rates every spot for each species and season.

When is the best time to fish Tiber Reservoir?

For walleye, the summer bite is best in the evening and early morning. 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 Tiber Reservoir?

Fishing on Tiber Reservoir 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 Frances 49 mi · Bailey Reservoir 50 mi · Wadsworth Lake 60 mi · Lewis Pond South 61 mi · Ostle Reservoir 72 mi · Pishkun Reservoir 76 mi · Split Rock Lake 79 mi · Willow Creek Reservoir 81 mi · Tunnel Lake 82 mi · Gollaher Reservoir 82 mi · Kolar Reservoir 2 82 mi · Missouri River 88 mi

See how Tiber Reservoir stacks up: best walleye lakes in Montana · best sauger lakes in Montana · best northern pike lakes in Montana · best rainbow trout 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.