Castle Rock NWR
Del Norte County, CA · 74 mi N
National Wildlife Refuge · California · FWS Region 8
Humboldt Bay National Wildlife Refuge is located in Humboldt County, California, with about 3,927 acres of land owned in fee by the U.S. Fish and Wildlife Service. For the 2026–2027 season the refuge has 12 mapped hunt units: 8 open under general rules, 1 open with special regulations, and 3 closed, covering about 1,686 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.
Permitted hunting categories are waterfowl and migratory birds, subject to state seasons and refuge-specific rules. Fishing is available — tidal / saltwater fishing and shellfishing & crabbing.
The Humboldt Bay watershed is considered the most important wintering habitat between San Francisco Bay and the Columbia River.
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 |
|---|---|---|---|---|
| Eureka Slough Show on map · Directions |
✓Open | 87 | — | |
| Fernstrom-Root Island Show on map · Directions |
✓Open | 15 | — | |
| Hookton Islands Show on map · Directions |
✓Open | 6.4 | — | |
| Jacoby Creek Show on map · Directions |
✓Open | 58 | — | |
| South Bay Unit Show on map · Directions |
✓Open | 304 | — | |
| Table Bluff Show on map · Directions |
✓Open | 160 | — | |
| Teal Island Show on map · Directions |
✓Open | 140 | — | |
| White Slough Open Show on map · Directions |
✓Open | 472 | — | |
| Salmon Creek Show on map · Directions |
!Special regs | 443 | — | |
| Closed Show on map · Directions |
✕Closed | 1,203 | — | |
| Hookton Slough Show on map · Directions |
✕Closed | 972 | — | |
| White Slough Closed Show on map · Directions |
✕Closed | 68 | — |
With about 1,686 huntable acres, Humboldt Bay NWR ranks #14 of 21 refuges and stations with mapped hunting land in California and #336 of 420 nationwide. Roughly 43% of the acreage inside its mapped hunt units is open to hunting in some form.
The largest huntable unit is White Slough Open (472 acres), while the smallest, Hookton Islands, covers 6.4 acres.
3 units totaling 2,243 acres are closed to hunting (Closed, Hookton Slough, and White Slough Closed). Closed areas often serve as sanctuaries — learn their boundaries before you set up nearby.
Typical U.S. season windows for the game categories offered here. California sets the exact dates, and refuges often open fewer days than the statewide season — use this to plan scouting, then confirm the 2026–2027 dates in the state regulations and the refuge hunt brochure.
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.
Refuge waters include South Humboldt Bay. Fishing is permitted over refuge tidelands. Non-motorized boat launch and dock are at the Hookton Slough Unit. Public boat launch is at Fields Landing. Fishing season is year-round.
State fishing licenses and regulations apply. Some waters close seasonally to protect wildlife.
Destination: Humboldt Bay National Wildlife Refuge (FWS reference point)
40.68758, -124.2158740°41′15.3″N 124°12′57.1″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 | 6:12 AM | 6:42 AM | 7:51 PM | 13h 09m |
| Tue, Sep 15, 2026 | 6:26 AM | 6:56 AM | 7:28 PM | 12h 32m |
| Thu, Oct 1, 2026 | 6:41 AM | 7:11 AM | 7:00 PM | 11h 49m |
| Thu, Oct 15, 2026 | 6:56 AM | 7:26 AM | 6:38 PM | 11h 12m |
| Sun, Nov 1, 2026 | 6:16 AM | 6:46 AM | 5:14 PM | 10h 29m |
| Sun, Nov 15, 2026 | 6:32 AM | 7:02 AM | 5:00 PM | 9h 57m |
| Tue, Dec 1, 2026 | 6:51 AM | 7:21 AM | 4:51 PM | 9h 30m |
| Tue, Dec 15, 2026 | 7:03 AM | 7:33 AM | 4:50 PM | 9h 17m |
| Fri, Jan 1, 2027 | 7:10 AM | 7:40 AM | 4:59 PM | 9h 18m |
| Fri, Jan 15, 2027 | 7:08 AM | 7:38 AM | 5:12 PM | 9h 34m |
| Mon, Feb 1, 2027 | 6:57 AM | 7:27 AM | 5:32 PM | 10h 05m |
Computed for 40.688, -124.216 (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.
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Yes. Humboldt Bay National Wildlife Refuge offers hunting in 9 units (1,686 acres) during 2026–2027 for waterfowl 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 Humboldt Bay 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 (tidal / saltwater fishing and shellfishing & crabbing). State fishing licenses and regulations apply along with refuge rules.
Humboldt Bay National Wildlife Refuge is in Humboldt County, California, about 8 miles S of Eureka, CA (straight-line). GPS: 40.68758, -124.21587.
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.
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Data: USFWS National Hunt Units 2026–2027, Hunting & Fishing Opportunities, Realty Boundaries & Tracts. Page updated October 28, 2026.