Prospect Heights Trailhead

The Hemlock Burn and South Fork Rim Loop offers a fantastic mountain biking adventure, blending scenic climbs with exhilarating descents. You'll start with a gradual ascent on the South Fork Rim Trail, where you're treated to stunning views of the Chugach Mountains, before transitioning to the fast and flowy Hemlock Burn Trail, which offers rollers, berms, and amazing views of the Anchorage bowl. This 10.4-mile (16.7 km) route with 1260 feet (384 metres) of elevation gain is a moderate challenge that takes about 1 hour and 41 minutes, perfect for intermediate riders.

To tackle this loop, you'll typically begin at the Prospect Parking Lot. Keep in mind that the South Fork Rim Trail is a multi-use path, so you should be prepared to encounter hikers, skiers, and wildlife; carrying bear bells is a sensible precaution. It's also a good idea to have a map handy to navigate the trail system and ensure you stay on bike-friendly routes.

What makes this route stand out is the Hemlock Burn Trail, one of the few trails in Chugach State Park specifically designed for mountain biking. Built by Singletrack Advocates, it connects seamlessly to the larger Hillside trail system, hinting at a grander vision for downhill riding at the edge of Anchorage. This loop provides a great taste of that vision, combining natural beauty with purpose-built flow.

The Lower Hemlock Burn Loop offers a distinctive mountain biking experience in Chugach State Park, known for its fast, flowy, and smooth terrain. You'll encounter numerous rollers and berms as you navigate the trail, with impressive views of the Anchorage bowl and the Chugach mountains unfolding around you. It's an easy 5.8-mile (9.4 km) ride with 686 feet (209 metres) of elevation gain, typically completed in about 56 minutes, making it a great option for a quick, fun outing.

To ride this loop, you'll likely start from the Prospect Heights Trailhead, which provides convenient parking. While the trail is multi-use, mountain bikers are encouraged to follow a one-way downhill flow from Glen Alps to Prospect for a better and safer experience. Always be mindful that you're in bear country, so keep an eye out for wildlife like bears and moose.

This trail stands out as one of the few in Chugach State Park specifically designed with mountain biking in mind, constructed between 2020 and 2021. It serves as a preferred downhill route, helping to manage bike traffic on other paths like the South Fork Rim Trail. The loop connects to the wider Hillside trail system, offering possibilities for extended rides and linking to other trails if you're looking for more adventure.

Embark on the Powerline Pass Trail for a challenging mountain biking experience through Chugach State Park. This moderate route spans 17.6 miles (28.4 km) and involves a significant elevation gain of 2575 feet (785 metres), typically taking around 3 hours and 5 minutes to complete. You will navigate varied terrain, from wide doubletrack paths to steeper, rockier sections that demand your attention, all while enjoying expansive mountain views and vast vistas of valleys and streams.

To plan your ride, you can park at the Glen Alps parking lot, which serves as a convenient starting point. While the trail is accessible year-round, be prepared for potential snow patches at higher elevations, even during summer months, which can affect riding conditions. For those looking to experience the full traverse, a car shuttle option is available, making the descent-focused ride more appealing.

As you ride, keep an eye out for local wildlife, including moose, and be aware of bears in the area. The route offers intermittent views of Denali on clear days, along with stunning vistas of Anchorage's hillsides. You will also catch the best views of the Cook Inlet as it branches into the Turnagain and Knik Arms, providing a memorable backdrop to your adventure.