Fourth of July Trailhead

The Fourth of July Trailhead at a glance

The Fourth of July Trailhead is one of the main gateways into the Indian Peaks Wilderness from the Boulder side, tucked at the head of the North Fork of Middle Boulder Creek, west of the town of Eldora. It's high, about 10,100 feet at the trailhead, and it's a genuine hub: from the parking area the Arapaho Pass, Diamond Lake, and Arapaho Glacier trails all fan out into the wilderness. It's a different access than Brainard Lake or the nearby Hessie Trailhead, and it comes with its own quirks, mainly the road and the crowds. There's also a small City of Boulder campground, Buckingham Campground, right at the trailhead, and some private property nearby, so don't trespass.

Getting there and the road

From Nederland, head south on Colorado Highway 119 for about half a mile and turn west onto Boulder County Road 130, signed for Eldora. Stay on the main road through the town of Eldora. Where the pavement ends, the route continues as the rough dirt Fourth of July Road for roughly five more miles to the trailhead. The Forest Service describes this last stretch as a two-wheel-drive road that's rough but passable by a passenger car during the summer months, so you don't strictly need a jeep, but you do need patience and a slow, careful pace. The road is maintained by Boulder County, there's no seasonal gate, but winter maintenance doesn't happen, so once snow arrives motorized access is typically not possible.

Parking and when it fills

The Forest Service calls this trailhead exceedingly popular, and parking is limited, especially on summer weekends. There's no timed-entry reservation to smooth out the crowds the way there is at Brainard Lake, which means the lot simply fills, early. The honest plan is a dawn start or a weekday. If you arrive to a full lot, park only in designated areas and never block the road or private drives.

Do you need a reservation or permit?

For a day hike, no reservation and no permit. The Fourth of July Trailhead isn't part of the Indian Peaks timed-entry system that covers the Brainard Lake corridor, and there's no entrance fee. If you want to camp overnight in the wilderness, that's different: overnight backcountry permits are required from June 1 through September 15 and are booked through Recreation.gov, with a separate permit needed for each backcountry zone you camp in. Camping in the Diamond Lake zone is allowed only in designated sites, and bear canisters are required near the trailhead and throughout the Diamond Lake zone.

The hikes: Arapaho Pass, Lake Dorothy, Diamond Lake, and the glacier trail

This is what people drive the rough road for. From the trailhead the Arapaho Pass Trail climbs the drainage and reaches the Diamond Lake Trail junction at 1.2 miles, the Arapaho Glacier Trail junction at 2.1 miles, and Arapaho Pass itself at 3.3 miles, where the elevation tops out at 11,906 feet (all distances one-way, per the Forest Service). Lake Dorothy is a high alpine lake reached by a short spur just below Arapaho Pass, a classic turnaround. The Diamond Lake Trail branches left off the Arapaho Pass Trail and drops across the creek toward the wildflower-filled Diamond Lake basin. The Arapaho Glacier Trail heads the other way toward Boulder's high country. Almost everything here is above or near treeline, so plan to be heading down before afternoon thunderstorms build.

Dogs, wilderness rules, and bear canisters

Dogs are welcome, but the Indian Peaks Wilderness rule is a hand-held leash at all times, not voice control. A few other wilderness rules apply here: campfires are prohibited year round at this trailhead, group size is capped at 12 people and livestock combined, campsites must be at least 100 feet from water and trail, and motorized or mechanized travel (including bikes) isn't allowed past the wilderness boundary. Bear canisters are required near the trailhead and in the Diamond Lake backcountry zone, so pack your food storage accordingly.

Best season and road season

The sweet spot is summer through early fall, once the snow has melted off both the road and the high passes, which lines up with the June 1 to September 15 overnight-permit window and the peak wildflower weeks of mid to late summer. Because the road isn't plowed or maintained in winter, treat the driving access as a warm-season thing; in the shoulder seasons, call the Boulder Ranger District or check current conditions before you commit to the drive.

Nearby trails and guides

• Diamond Lake: the wildflower-and-waterfalls hike that branches off the Arapaho Pass Trail from this same trailhead.
• Nederland: the mountain town you pass through on the way up, and the place to fuel up or stay the night.
• All hikes in Boulder: the full hiking hub, sorted by difficulty.

Recommended nearby

A few local spots we'd point a Fourth of July day toward, most of them in Nederland on the way up.

Fourth of July Trailhead FAQ

Sources

Facts on this page are drawn from these authoritative sources:

• US Forest Service: Fourth of July Trailhead
• US Forest Service: Arapaho Pass Trail (distances and elevations)
• US Forest Service: Diamond Lake Trail (directions)
• US Forest Service: Indian Peaks Wilderness (permits, dogs, bear canisters)
• City of Boulder: Buckingham Campground at the Fourth of July Trailhead