Mortenson Lake NWR
Albany County, WY · 51 mi NE
National Wildlife Refuge · Colorado · FWS Region 6
Arapaho National Wildlife Refuge lies in Jackson County, Colorado, with about 22,531 acres of land owned in fee by the U.S. Fish and Wildlife Service. For the 2026–2027 season the refuge has 5 mapped hunt units: 2 open with special regulations and 3 closed, covering about 15,387 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 big game, waterfowl, upland birds, migratory birds, and small game here, subject to state seasons and refuge-specific rules. Fishing is available — freshwater fishing. A refuge permit is required for at least some activities, in addition to your state license. Special youth hunting opportunities are offered.
Arapaho National Wildlife Refuge was established to help offset the loss of wetlands throughout the prairies of the Midwest and today provides important habitat for waterfowl in Colorado.
The refuge is open to youth hunters during the state youth waterfowl weekend.
All refuges with youth hunts →Categories are those listed by USFWS for this station; exact species, seasons and bag limits follow Colorado regulations plus refuge-specific rules.
| Unit | Status | Acres | Permit | Details |
|---|---|---|---|---|
| B Show on map · Directions |
!Special regs | 8,266 | Required Signed Brochure or Similar |
Elk hunting during all 4 rifle seasons. 🧒 The refuge is open to youth hunters during the state youth waterfowl weekend. |
| C Show on map · Directions |
!Special regs | 7,121 | Required Signed Brochure or Similar |
Elk hunting during all 4 rifle seasons. 🧒 The refuge is open to youth hunters during the state youth waterfowl weekend. |
| A Show on map · Directions |
✕Closed | 4,649 | Required Signed Brochure or Similar |
Elk hunting during all 4 rifle seasons. 🧒 The refuge is open to youth hunters during the state youth waterfowl weekend. |
| Chandler Show on map · Directions |
✕Closed | 2,240 | Required Signed Brochure or Similar |
Elk hunting during all 4 rifle seasons. 🧒 The refuge is open to youth hunters during the state youth waterfowl weekend. |
| D Show on map · Directions |
✕Closed | 2,506 | Required Signed Brochure or Similar |
Elk hunting during all 4 rifle seasons. 🧒 The refuge is open to youth hunters during the state youth waterfowl weekend. |
With about 15,387 huntable acres, Arapaho NWR ranks #2 of 7 refuges and stations with mapped hunting land in Colorado and #137 of 420 nationwide. Roughly 62% of the acreage inside its mapped hunt units is open to hunting in some form.
The largest huntable unit is B (8,266 acres, special regulations), while the smallest, C, covers 7,121 acres. Every huntable unit requires a refuge permit.
3 units totaling 9,396 acres are closed to hunting (A, Chandler, and D). Closed areas often serve as sanctuaries — learn their boundaries before you set up nearby.
Besides 22,531 acres of federally owned land, the station administers conservation easements on about 568 acres of private land. Easement land protects habitat but is not open to public hunting.
Typical U.S. season windows for the game categories offered here. Colorado 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.
Required
Elk hunting during all 4 rifle seasons.
Type: Signed Brochure or Similar
How to get it:
The refuge offers fly fishing for brown and rainbow trout. The Illinois River is the only area on the refuge open to fishing. The refuge is closed to fishing June 1-July 31 to reduce impact on nesting birds.
State fishing licenses and regulations apply. Some waters close seasonally to protect wildlife.
Destination: Arapaho National Wildlife Refuge (FWS reference point)
40.58661, -106.3356640°35′11.8″N 106°20′08.4″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 Denver local time.
Full season calculator →| Date | Shooting light | Sunrise | Sunset | Daylight |
|---|---|---|---|---|
| Tue, Sep 1, 2026 | 6:01 AM | 6:31 AM | 7:39 PM | 13h 08m |
| Tue, Sep 15, 2026 | 6:14 AM | 6:44 AM | 7:16 PM | 12h 32m |
| Thu, Oct 1, 2026 | 6:30 AM | 7:00 AM | 6:49 PM | 11h 49m |
| Thu, Oct 15, 2026 | 6:44 AM | 7:14 AM | 6:26 PM | 11h 12m |
| Sun, Nov 1, 2026 | 6:04 AM | 6:34 AM | 5:03 PM | 10h 29m |
| Sun, Nov 15, 2026 | 6:21 AM | 6:51 AM | 4:49 PM | 9h 58m |
| Tue, Dec 1, 2026 | 6:39 AM | 7:09 AM | 4:39 PM | 9h 31m |
| Tue, Dec 15, 2026 | 6:51 AM | 7:21 AM | 4:39 PM | 9h 18m |
| Fri, Jan 1, 2027 | 6:58 AM | 7:28 AM | 4:47 PM | 9h 19m |
| Fri, Jan 15, 2027 | 6:56 AM | 7:26 AM | 5:01 PM | 9h 34m |
| Mon, Feb 1, 2027 | 6:45 AM | 7:15 AM | 5:21 PM | 10h 05m |
Computed for 40.587, -106.336 (MDT / 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. Arapaho National Wildlife Refuge offers hunting in 2 units (15,387 acres) during 2026–2027 for big game, waterfowl, upland birds, migratory birds, and small game. Seasons follow state regulations plus refuge-specific rules in 50 CFR Part 32.
Yes — Arapaho National Wildlife Refuge requires a refuge permit for some or all hunting. Permit type: Signed Brochure or Similar. Permits can be obtained mail or online (e.g. recreation.gov). You also need the appropriate state hunting license and, for waterfowl, a Federal Duck Stamp.
Yes. Fishing is permitted (freshwater fishing). State fishing licenses and regulations apply along with refuge rules.
Arapaho National Wildlife Refuge is in Jackson County, Colorado, about 10 miles S of Walden, CO (straight-line). GPS: 40.58661, -106.33566.
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.
Albany County, WY · 51 mi NE
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Data: USFWS National Hunt Units 2026–2027, Hunting & Fishing Opportunities, Realty Boundaries & Tracts. Page updated October 28, 2026.