Unit 43, Colorado

Elevation ranges from approximately 6,500 feet in the valley bottoms (Roaring Fork River corridor) to 14,138 feet on Capitol Peak in the Elk Mountains (Snowmass Mountain reaches 14,105 feet). The unit is defined by steep creek drainages — Crystal River, Frying Pan River, and Roaring Fork tributaries — flanked by high alpine basins, rugged ridgelines, and two 14,000-foot summits. About 40 percent of the unit is roadless wilderness where vehicles are prohibited. Lower valley terrain is largely developed or agricultural.

The unit is managed primarily by the White River National Forest. The Aspen-Sopris Ranger District office is at 620 Main Street, Carbondale, CO 81623, (970) 963-2266; the White River NF Supervisor's Office is at 900 Grand Avenue, Glenwood Springs, CO 81601, (970) 945-2521. Key highway corridors are Colorado 82 (Glenwood Springs to Aspen through the Roaring Fork Valley) and Colorado 133 (Carbondale south through Marble to McClure Pass), which roughly bracket the unit's western edge. The Crystal River Road (County Road 3) off CO-133 provides paved access south toward Marble and Bogan Flats Campground; the Frying Pan Road (Forest Road 105) out of Basalt runs east along the Frying Pan River to Chapman Campground and Lost Man trailhead. Hunter-Fryingpan Wilderness (~82,026 acres) is accessed via approximately 11 trailheads and 65 miles of trail; the Lost Man Trail up Lost Man Creek is a primary entry into the wilderness interior. Maroon Bells-Snowmass Wilderness is accessible from trailheads west of Aspen. Four-wheel-drive and ATV trails branch off maintained roads in the national forest to reach elk summer range but most high-country hunting requires backpacking or pack-string access. Overnight camping in portions of the Maroon Bells-Snowmass Wilderness (Capitol Lake, Geneva Lake, North Fork Lake, East Fork zones) requires advance reservation permits (fs.usda.gov/whiteriver). A block of private land exists east of CO-133 in the lower Crystal River drainage. The unit is approximately 74 percent public land (65 percent USFS, 8 percent BLM) and 26 percent private.

Vegetation transitions sharply by elevation. Sagebrush and oakbrush dominate foothills and lower valley benches. Mixed conifer (Douglas-fir, ponderosa pine) and large aspen groves cover mid-elevations. Upper slopes hold dense spruce-fir forest with elk summer range extending to treeline (approximately 11,500 feet). Above treeline, alpine meadows and rocky tundra provide late-summer grazing habitat. Riparian corridors along the Crystal River, Frying Pan River, and Roaring Fork River contain cottonwood and willow. Beetle-kill patches are present in portions of the spruce-fir zone.

Elk are the primary big game species and the unit holds significant populations throughout the White River National Forest. Elk summer in the high alpine basins and spruce-fir zones above 9,000 feet and migrate to lower winter range in the Roaring Fork and Crystal River valleys, including onto private lands, as snow deepens. Mule deer follow similar vertical migration patterns and are present throughout the unit. Shiras moose occupy riparian willows along the Crystal River, Frying Pan River, and tributary drainages; the moose season is resident-only cow and bull. Black bear inhabit the entire unit, moving from lower berry patches to high-country berry fields through summer and early fall. Mountain lion are present but regulated under a separate CPW lion season. Bull elk taken in all seasons must have four points or more on one antler, OR a brow tine of at least 5 inches long. No pronghorn or bighorn sheep hunt codes appear for this unit in current regulations.

1. Elk success rate (23%) is from 2022 HuntScore GMU-level data across all hunters and methods — not directly comparable to CPW DAU-level estimates. Tag quotas require CPW draw recap report. 2. Capitol Peak elevation corrected to 14,138 ft and Snowmass Mountain to 14,105 ft from 14ers.com; draft peak elevation of 14,156 ft was incorrect. 3. Aspen-Sopris Ranger District address corrected to 620 Main St, Carbondale, CO (970-963-2266); 900 Grand Ave / 970-945-2521 is the White River NF Supervisor's Office. 4. Mule deer and moose GMU-level harvest stats not available at unit level. 5. Nonresident archery elk west of I-25 now requires draw (E-E-043-V1-A) as of 2025 season structure. 6. Collegiate Peaks Wilderness inclusion in GMU 43 reflects the small Pitkin County / White River NF portion of that wilderness. 7. Bull elk antler restriction (4-point or 5-inch brow tine) applies in GMU 43 per 2025 CPW regulations. 8. Verify all hunt codes and season dates against the current-year CPW Big Game Brochure before applying.