Hailstone NWR
Stillwater County, MT · 6.1 mi NW
✓1 open
🦌🦆🦃🐦🕊️
156 huntable acres
Grass Lake NWR hunt unit map
Hunt units are colored by 2026–2027 status. Toggle layers for FWS-owned land, the approved refuge boundary and private easements. Use satellite imagery to scout marshes, timber edges and access points.
Loading interactive map…
OpenSpecial regulationsClosedFWS-owned landWPA (public)Refuge boundaryEasement (private)
Tip: switch to Satellite or USGS Topo in the layer menu · click the map for GPS coordinates
Hunting at Grass Lake NWR
- Big Game
- Waterfowl
- Wild Turkey
- Upland Birds
- Migratory Birds
-
Small Game -
Feral & Exotic -
Fishing
Permitted hunting categories are big game, waterfowl, wild turkey, upland birds, and migratory birds, subject to state seasons and refuge-specific rules.
Big GameWhite-tailed and mule deer, elk, pronghorn, moose, bear and other large mammalsWaterfowlDucks, geese, brant, swans (where legal) and cootsWild TurkeySpring and fall wild turkeyUpland BirdsPheasant, quail, grouse, prairie chicken and partridgeMigratory BirdsMourning dove, woodcock, snipe, rails, gallinules and sandhill crane
Categories are those listed by USFWS for this station; exact species, seasons and bag limits follow Montana regulations plus refuge-specific rules.
Hunt units (2)
- Open1,712 ac 50%
- Closed1,682 ac 50%
| Unit | Status | Acres | Permit | Details |
|---|---|---|---|---|
| Open Unit | ✓Open | 1,712 | — | |
| Closed Unit | ✕Closed | 1,682 | — |
Permits & licenses
Refuge permit
Not listed
USFWS does not list a separate refuge permit for this station. Specific units or hunts (e.g. quota deer hunts) may still require one — check the hunt brochure.
You'll also need
- A valid Montana hunting license and any required tags or stamps — Montana Fish, Wildlife & Parks
- Federal Duck Stamp (waterfowl hunters 16+) and HIP certification for migratory birds
- Non-toxic shot for waterfowl (federal requirement)
- Hunter education certification where your state requires it
- The current refuge hunt brochure / regulations (often must be signed and carried)
Fishing at Grass Lake NWR
USFWS does not list fishing opportunities for Grass Lake NWR.
How to get to Grass Lake NWR
Navigate
Destination: Grass Lake National Wildlife Refuge (FWS reference point)
- Decimal
45.94199, -109.11190- DMS
45°56′31.2″N 109°06′42.8″W
Nearest towns
- Billings, MT31 mi W of town
- Lewistown, MT79 mi S of town
- Bozeman, MT95 mi E of town
- Cody, WY98 mi N of town
Closest airports
- BIL Billings Logan29 mi
- BZN Bozeman Yellowstone99 mi
Straight-line distances. Driving routes are longer; many refuge roads are gravel and may close seasonally.
The navigation point is the station reference location published by USFWS — often the headquarters or main entrance. For a specific hunt unit, open its page or click it on the map for coordinates and parking planning.
Sunrise, sunset & shooting hours
Today at Grass Lake NWR
Legal light*–
Sunrise–
Sunset–
*½ hour before sunrise — the standard federal shooting-hour start for migratory game birds. Times in Denver local time.
Full season calculator →2026–2027 season sun table
| Date | Shooting light | Sunrise | Sunset | Daylight |
|---|---|---|---|---|
| Tue, Sep 1, 2026 | 6:06 AM | 6:36 AM | 7:57 PM | 13h 22m |
| Tue, Sep 15, 2026 | 6:23 AM | 6:53 AM | 7:30 PM | 12h 37m |
| Thu, Oct 1, 2026 | 6:43 AM | 7:13 AM | 6:58 PM | 11h 46m |
| Thu, Oct 15, 2026 | 7:01 AM | 7:31 AM | 6:32 PM | 11h 01m |
| Sun, Nov 1, 2026 | 6:25 AM | 6:55 AM | 5:04 PM | 10h 09m |
| Sun, Nov 15, 2026 | 6:45 AM | 7:15 AM | 4:46 PM | 9h 31m |
| Tue, Dec 1, 2026 | 7:07 AM | 7:37 AM | 4:34 PM | 8h 57m |
| Tue, Dec 15, 2026 | 7:21 AM | 7:51 AM | 4:32 PM | 8h 41m |
| Fri, Jan 1, 2027 | 7:27 AM | 7:57 AM | 4:40 PM | 8h 43m |
| Fri, Jan 15, 2027 | 7:24 AM | 7:54 AM | 4:55 PM | 9h 01m |
| Mon, Feb 1, 2027 | 7:09 AM | 7:39 AM | 5:19 PM | 9h 40m |
Computed for 45.942, -109.112 (MDT / DST-aware). Check state rules — big game hours vary.
7-day hunting weather
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Forecast from the National Weather Service. Wind direction matters — plan your approach downwind of where game beds.
Grass Lake NWR FAQ
Is hunting allowed at Grass Lake NWR?
Yes. Grass Lake National Wildlife Refuge offers hunting in 1 unit (1,712 acres) during 2026–2027 for big game, waterfowl, wild turkey, upland birds, and migratory birds. Seasons follow state regulations plus refuge-specific rules in 50 CFR Part 32.
Do I need a permit to hunt Grass Lake NWR?
FWS data does not list a separate refuge hunting permit for Grass Lake NWR. You still need a valid state license, any required state tags or stamps, and (for waterfowl hunters 16+) a Federal Duck Stamp.
Where is Grass Lake NWR located?
Grass Lake National Wildlife Refuge is in Stillwater County, Montana, about 31 miles W of Billings, MT (straight-line). GPS: 45.94199, -109.11190.
What are legal shooting hours at Grass Lake NWR?
Migratory game bird shooting hours are generally one-half hour before sunrise to sunset; big game and other seasons follow state rules. See the sunrise/sunset table on this page and confirm in the refuge hunt brochure.
Nearby refuges & public land
Lake Mason NWR
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War Horse NWR
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Charles M. Russell WMD
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Bozeman FTC
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UL Bend NWR
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55.8K huntable acres
Waterfowl Production Areas within 35 miles
- Hailstone WPA 1,766 ac · 5.4 mi NW
- Hansen WPA 2,806 ac · 6.6 mi SE
- Spidel WPA 487 ac · 18 mi NE
- Spidel WPA 775 ac · 18 mi NE
- Tew WPA 557 ac · 28 mi NE
Data: USFWS National Hunt Units 2026–2027, Hunting & Fishing Opportunities, Realty Boundaries & Tracts. Page updated September 29, 2026.