Montana lake guide
Delmoe Lake Fishing
Delmoe Lake is a high-elevation Region 3 trout lake with substantial documented angling use. FishMT provides survey, regulation and fishing-pressure resources for trip planning and fisheries review.
LocationMontana
Primary targetsRainbow Trout
Best seasonSpring to early summer
Lake size279.147 acres
Guide reviewed
Scientific profile
Research snapshot
Elevation6,099.11 feet
Summer cautionHeat
Lake depth map
Depth contours may take a little time to load. Sorry for the inconvenience.
Contour line20 ft Visible depth label
Source: Montana Fish, Wildlife & Parks. Historical survey data may not reflect current water levels or underwater hazards. Informational only; not for navigation.
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What makes Delmoe Lake distinctive
Delmoe Lake sits at roughly 6,099 feet in elevation, so seasonal access and water temperature can differ sharply from lowland lakes.
Delmoe Lake has documented stocking context in the FishyNW research record, adding a managed-fishery component to its profile.
Measured & official data
Water Science
Loading available public monitoring and fishery science…
Pass 3 · depth + water column
Seasonal Fish Habitat
Surface · 0 ft
How to read this data
Temperature, dissolved oxygen, clarity, nutrients, chlorophyll-a, pH, and conductivity are observations from public monitoring records and may be historical. Thermocline depth is shown only when FishyNW can derive a strong vertical temperature gradient from a measured profile. It is not treated as a permanent lake characteristic.
Trophic indication uses the Carlson Trophic State Index only when FishyNW can normalize a measured chlorophyll-a, Secchi, or total-phosphorus value. It is a derived ecological indicator, not an agency impairment determination.
Seasonal Fish Habitat is shown only when verified bathymetry overlaps a same-day, same-station temperature and dissolved-oxygen profile. It is a historical screening snapshot, not a live prediction of where fish are located.
For lake trout, FishyNW uses the broader USGS-tested screening combination of water at or below 15°C (59°F) and dissolved oxygen at or above 4 mg/L. For other coldwater species, FishyNW does not invent a preferred-temperature threshold; it shows only the observed thermocline-to-oxygenated-depth refuge when the evidence supports it.
Harmful-algae status is never inferred from missing data. Always check the linked state source for current advisories before contact recreation.
Open matched Water Quality Portal recordsFishery record
Documented fish species
These species come from the lake record. Open a species guide for identification, seasonal behavior, and practical tactics without confusing general species guidance with a lake-specific survey result.
Trout and salmon
Rainbow Trout
Use bait, small spinners, spoons, or slow trolling depending on access.
View species guide
Trout and salmon
Yellowstone Cutthroat Trout
See seasonal habitat, presentations, identification, and regulation cautions.
View species guide
Trout and salmon
Brook Trout
See seasonal habitat, presentations, identification, and regulation cautions.
View species guide
Stocking information
Delmoe Lake Fish Stocking
Recent stocking information summarized from Montana Fish, Wildlife & Parks. Dates and quantities can change. Always verify current fishing rules with the official agency before fishing.
Official stocking history
Five-year summary · 2022–2026
View agency record Fish stocked26,574
Stocking events5
Years stocked3
Species stocked1
Species in this period: Westslope Cutthroat Trout
Most recent stockings
| Date | Species | Quantity | Size | Details |
|---|---|---|---|---|
| Sep 20, 2025 | Westslope Cutthroat Trout | 10,074 | 2.1 in avg length | Washoe Park Trout Hatchery · Montana FWP Fish Stocking Records |
| Sep 7, 2024 | Westslope Cutthroat Trout | 9,500 | 1.7 in avg length | Washoe Park Trout Hatchery · Montana FWP Fish Stocking Records |
Source: Montana Fish, Wildlife & Parks Last checked: Aug 26, 2026 7:19am
Fishery intelligence
Official fishery evidence
Agency survey records and measured fishery data, distilled for trip planning.
8
verified signals
Research & surveys
Official survey records available
Use the evidence
Turn records into a fishing plan
- Compare survey evidence with the seasonal guide.
- Use the map to connect depth, access, and structure.
- Confirm current rules and access before your trip.
Trip conditions
Current conditions
Loading the local forecast. Check access and official notices before leaving.
TodayLoading
WindLoading
GustsLoading
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Four day outlook
Tools
Today's Lure Pick
Open Tools for species-specific lure guidance.
Angler interpretation
How the fishery changes through the seasons
This is the practical layer: use it alongside the documented species, depth, stocking, survey, access, and regulation record above. The current season opens first.
Spring
trout- Start here
- Cooler water, recent stocking, fish moving shallow, and protected shorelines or inlets that warm first.
- Watch for
- Cold fronts, changing water levels, muddy inflow, and early-season ramp conditions.
Summer
listed species- Start here
- Fish early or late, then adjust toward deeper water, shade, vegetation, or comfortable temperature zones.
- Watch for
- Heat, weeds, algae, heat, and heavier boat traffic.
Fall
trout- Start here
- Cooling water, shoreline structure, points, weed edges, and simple presentations that let you cover water.
- Watch for
- Wind on open water, rapidly changing weather, and shorter daylight windows.
Winter
trout- Start here
- Legal open-water or ice access, stable depth zones, and conservative cold-weather trip plans.
- Watch for
- Ice safety where relevant, ramps, road conditions, cold-water exposure, and current rules.
Know before you go
Rules and restrictions
Check current Montana FWP fishing regulations, waterbody exceptions, closures and fish-consumption guidance before fishing.
Getting on the water
Access and launches
High-elevation lake east of Butte with established recreational fishing use. Access is seasonal and mountain weather can affect road and ice conditions.
Sorry, there are no mapped boat ramps for this lake yet. Check the access information below for other ways to reach the water.
Keep exploring
Nearby waters
Georgetown Lake
about 47.0 miles away
Georgetown Lake is a major western Montana trout and kokanee destination where elevation, weather, ice season, boating access,…
Canyon Ferry Reservoir about 50.0 miles awayCanyon Ferry Reservoir is one of Montana's major multi-species fisheries. FWP manages it for rainbow trout, walleye, yellow…
Ennis Lake about 50.8 miles awayEnnis Lake is a shallow Madison River reservoir known primarily for trout fishing. Its productivity, wind exposure, warm-season…
Hauser Reservoir about 54.1 miles awayHauser Reservoir is a heavily used Missouri River reservoir with rainbow and brown trout, walleye, perch and kokanee…
After the trip
Log what happened on the water
Use CatchSignal for catch reports, trip history, photos, and community activity. Keep your fishing history while controlling how much location detail you share.
Sources & feedback
Verified resources
Official links for this lake
Open the source that matches what you are planning.
Community feedback
See something that needs an update?
Send the correction and, when possible, the source. FishyNW reviews submissions before changing the guide.