Flattop Mountain Hiking Guide
Flattop is Anchorage's mountain. From the Glen Alps trailhead, half an hour from downtown, a short, steep trail climbs above the city to a broad summit with views over Anchorage and Cook Inlet. Alaska State Parks calls it the most often climbed peak in Alaska. It is short, but the final section is a real scramble up loose rock, and the weather can change in minutes.
Permit: Chugach State Park parking fee: $5 per day at Glen Alps, or the $60 Alaska State Parks annual parking pass
The Climb
Alaska State Parks lists the trail at 1.7 miles one way with about 1,300 feet of gain, for a round trip of about 3.4 miles; mapping apps give slightly less. The first section climbs through alpine tundra on a well-used trail. The final pitch steepens into a talus scramble marked with paint, where you use your hands and watch for rocks dislodged by climbers above.
Weather and Seasons
The summit is often cold and windy even when Anchorage is mild; bring layers and gloves. There is no water on the trail. Summer and early fall are the main hiking seasons, with berry picking in late summer. In winter and spring the upper mountain is avalanche-prone, and snow can linger into June; winter ascents require avalanche awareness and proper gear.
Bears and Moose
Chugach State Park is home to hundreds of black bears as well as brown bears, and moose frequent the Hillside trails. Carry bear spray, make noise, and give moose a very wide berth — a cow with calves is especially dangerous. The popularity of Flattop reduces but does not eliminate encounters.
Parking
Glen Alps charges $5 per day, payable by card or envelope, or you can use the $60 Alaska State Parks annual parking pass. The lot fills quickly on sunny weekends and weekday evenings. Summer evenings are a local tradition here — with long daylight, many Anchorage residents hike Flattop after work.
Dogs
In Chugach State Park, pets must be leashed in trailhead parking lots and kept under control on trails. The summit scramble is hard on dogs, and loose rock kicked down by a dog can injure hikers below. Consider turning around before the final scramble if you are hiking with one.
Hiking tips for Flattop Mountain
- Watch for falling rock on the final scramble and don't climb directly below others.
- Pay the $5 Glen Alps fee or display the $60 annual state parks pass.
- Arrive early on sunny weekends; the Glen Alps lot fills fast.
- Carry bear spray and give moose a wide berth on the Hillside trails.
- Bring a warm layer — the summit is often cold and windy even in summer.
Nearby trails to explore
- Wolverine Peak
- Rabbit Lake
- Bird Ridge
Hike this trail with TrailMates
Flattop is Anchorage's classic after-work summit. Use TrailMates to find Anchorage hikers for a Glen Alps evening climb. Download the TrailMates app to connect.