Grasslands Wildlife Management Area
Merced County, CA · 11 mi E
3K huntable acres
National Wildlife Refuge · California · FWS Region 8
Located in Merced County, California, San Luis National Wildlife Refuge is managed by the U.S. Fish and Wildlife Service, with about 17,815 acres of land owned in fee by the U.S. Fish and Wildlife Service. For the 2026–2027 season the refuge has 7 mapped hunt units: 6 open with special regulations and 1 closed, covering about 10,145 huntable acres.
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.
Hunters can pursue waterfowl, upland birds, and migratory birds here, subject to state seasons and refuge-specific rules. Fishing is available — freshwater fishing.
San Luis National Wildlife Refuge in California’s San Joaquin Valley is a major wintering ground and migratory stopover point on the Pacific Flyway for large concentrations of waterfowl, shorebirds and other waterbirds.
Categories are those listed by USFWS for this station; exact species, seasons and bag limits follow California regulations plus refuge-specific rules.
| Unit | Status | Acres | Permit | Details |
|---|---|---|---|---|
| Blue Goose Unit | !Special regs | 85 | — | |
| Kesterson Unit | !Special regs | 4,381 | — | |
| North Freitas Unit | !Special regs | 2,318 | — | |
| San Luis Unit | !Special regs | 2,565 | — | |
| South Freitas Unit | !Special regs | 126 | — | |
| Upland Freitas Unit | !Special regs | 671 | — | |
| Closed | ✕Closed | 7,670 | — |
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.
A section of Salt Slough, accessed via the Elk Tour Route, is open to fishing daily year-round. Refuge visitation hours are one-half hour before sunrise to one-half hour after sunset (dawn to dusk).
State fishing licenses and regulations apply. Some waters close seasonally to protect wildlife.
Destination: San Luis National Wildlife Refuge (FWS reference point)
37.27835, -120.9027237°16′42.1″N 120°54′09.8″WStraight-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.
*½ hour before sunrise — the standard federal shooting-hour start for migratory game birds. Times in Los Angeles local time.
Full season calculator →| Date | Shooting light | Sunrise | Sunset | Daylight |
|---|---|---|---|---|
| Tue, Sep 1, 2026 | 6:03 AM | 6:33 AM | 7:34 PM | 13h 01m |
| Tue, Sep 15, 2026 | 6:14 AM | 6:44 AM | 7:13 PM | 12h 29m |
| Thu, Oct 1, 2026 | 6:27 AM | 6:57 AM | 6:48 PM | 11h 51m |
| Thu, Oct 15, 2026 | 6:40 AM | 7:10 AM | 6:28 PM | 11h 18m |
| Sun, Nov 1, 2026 | 5:57 AM | 6:27 AM | 5:07 PM | 10h 40m |
| Sun, Nov 15, 2026 | 6:12 AM | 6:42 AM | 4:54 PM | 10h 12m |
| Tue, Dec 1, 2026 | 6:28 AM | 6:58 AM | 4:47 PM | 9h 48m |
| Tue, Dec 15, 2026 | 6:40 AM | 7:10 AM | 4:47 PM | 9h 37m |
| Fri, Jan 1, 2027 | 6:47 AM | 7:17 AM | 4:55 PM | 9h 38m |
| Fri, Jan 15, 2027 | 6:46 AM | 7:16 AM | 5:07 PM | 9h 51m |
| Mon, Feb 1, 2027 | 6:37 AM | 7:07 AM | 5:26 PM | 10h 19m |
Computed for 37.278, -120.903 (PDT / DST-aware). Check state rules — big game hours vary.
Loading National Weather Service forecast…
Forecast from the National Weather Service. Wind direction matters — plan your approach downwind of where game beds.
Yes. San Luis National Wildlife Refuge offers hunting in 6 units (10,145 acres) during 2026–2027 for waterfowl, upland birds, and migratory birds. Seasons follow state regulations plus refuge-specific rules in 50 CFR Part 32.
FWS data does not list a separate refuge hunting permit for San Luis NWR. You still need a valid state license, any required state tags or stamps, and (for waterfowl hunters 16+) a Federal Duck Stamp.
Yes. Fishing is permitted (freshwater fishing). State fishing licenses and regulations apply along with refuge rules.
San Luis National Wildlife Refuge is in Merced County, California, about 15 miles N of Los Banos, CA (straight-line). GPS: 37.27835, -120.90272.
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.
Merced County, CA · 11 mi E
3K huntable acres
Merced County, CA · 16 mi SE
1.9K huntable acres
Stanislaus County, CA · 30 mi NW
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60 huntable acres
Data: USFWS National Hunt Units 2026–2027, Hunting & Fishing Opportunities, Realty Boundaries & Tracts. Page updated September 29, 2026.