Mount Bierstadt and The Sawtooth Loop

The trail typically starts from the Guanella Pass Trailhead. Parking can be very limited, especially on weekends. It's highly recommended to arrive before 7 AM to secure a spot. During peak season, a shuttle service might operate from designated parking areas further down Guanella Pass Road.

Yes, dogs are generally allowed on this trail. However, it's crucial to keep them on a leash, especially since much of the route is within the Mount Evans Wilderness. The Class 3 scramble on The Sawtooth can be challenging for dogs, and some sections might require them to be lifted or carried.

The ideal time to hike this high-alpine loop is typically from late June through September, once the snow has melted and before new snow arrives. Always check the weather forecast for afternoon thunderstorms, which are common in the Colorado high country.

There is no specific permit required to hike the Mount Bierstadt and The Sawtooth Loop itself. However, the trail is located within the Mount Evans Wilderness, which means certain regulations apply, such as Leave No Trace principles. While there isn't an entrance fee for the wilderness area, there may be fees associated with parking at certain trailheads or using shuttle services during peak times.

This loop is considered a difficult hike. While the ascent of Mount Bierstadt Summit from Guanella Pass is often a Class 1 or 2, The Sawtooth traverse significantly increases the difficulty to a Class 3 scramble. This section involves considerable exposure, loose rock, and navigating a prominent gendarme, requiring experience with scrambling.

The terrain is highly varied. You'll start with relatively flat stretches over willows and wetlands, often on wooden boardwalks. The ascent of Mount Bierstadt involves switchbacks, scree, and solid talus. The Sawtooth traverse is characterized by jagged, knife-like rock formations, exposed ledges, and loose rock. The descent includes a steep gully of loose dirt and scree, followed by a notorious muddy 'willows section' that can be challenging to navigate.

You'll experience expansive views from the start, including the Guanella Pass Summit. As you ascend, you'll get stunning views of the Sawtooth ridgeline, Abyss Lake, and a beautiful tundra landscape. The summits of Mount Bierstadt Summit and Mount Blue Sky offer panoramic vistas of the surrounding peaks and valleys. You'll also pass the Mount Evans Wilderness boundary and get a View of Deadmans Lake.

The full loop is approximately 12.9 km (8 miles) long with over 900 meters (3,000 feet) of elevation gain. Komoot estimates the duration to be around 7 hours, but this can vary significantly based on fitness levels, weather conditions, and experience with Class 3 scrambling. Many hikers plan for 8-10 hours to safely complete the traverse.

Yes, the route primarily follows sections of the Mount Bierstadt Trail and the Sawtooth Ridge Traverse. It also briefly connects with parts of the Mount Blue Sky Ridge Trail.

Given the high-alpine environment and challenging terrain, essential gear includes sturdy hiking boots, layers of clothing (even in summer), rain gear, plenty of water (there's a Stream crossing early on, but no reliable water sources higher up), high-energy snacks, a map and compass or GPS device, sunscreen, sunglasses, and a headlamp. Trekking poles can be helpful for the ascent and descent, but may be cumbersome on the Class 3 scramble.

The final 'willows section' is indeed notorious. After a long day of hiking, it can be muddy, difficult to navigate, and the tall willows can obscure the trail, making it feel like a 'bushwhack.' While it's a challenging finish, it's a memorable part of the loop's character and requires patience and careful route-finding.