Sunnyside Trail and Red Mountain Loop

This challenging hike, covering nearly 20 kilometers, generally takes around 6 to 7 hours to complete. The significant elevation gain means you'll want to factor in plenty of time for breaks and to enjoy the views.

The terrain is quite varied. You'll encounter steady, switchbacking climbs through meadows and scrub oak, often exposed to the sun. Some sections are gravel or asphalt, particularly near the start. The return route can offer pleasant, shaded forest sections and quiet aspen groves, providing a nice contrast to the initial ascent.

You can expect extensive and rewarding views throughout the hike. The Sunnyside Trail offers sweeping vistas of the Aspen valley and surrounding peaks. As you climb Red Mountain, you'll see the town of Aspen below and distant mountains, including glimpses of Maroon Bells and Pyramid Peak. Don't miss the View of Aspen from Red Mountain for a truly spectacular panorama.

Yes, the trail is generally dog-friendly. However, it's always best to keep your dog on a leash, especially given the popularity of the route and potential wildlife encounters. Remember to pack out any waste.

The best time to hike this loop is typically from late spring through early fall. It's particularly stunning in the fall when the aspen trees change color, offering vibrant foliage. Be prepared for sun exposure during summer months, and check trail conditions if hiking early or late in the season.

The trail typically begins by branching off the Rio Grande Trail. A common starting point is near the Sunnyside Trail Trailhead. Parking can be found in designated areas near the trailhead, but as it's a popular route, arriving early is advisable, especially on weekends.

No, you do not typically need a permit or have to pay an entrance fee to hike the Sunnyside Trail and Red Mountain Loop. It's generally accessible to the public without specific permits.

This loop is generally classified as a difficult hike due to its substantial elevation gain (over 850 meters) and nearly 20-kilometer distance. While there are some mellow parts, it requires good fitness and sturdy shoes. It's not typically recommended for beginners or families with young children, though experienced hiking families might manage it.

Yes, the route intersects with several other paths. It begins by branching off the Rio Grande Trail and also passes through sections of the Sunnyside Trail, Shadyside, and the Red Mountain Communication Site Road.

Many hikers prefer to tackle the steeper, more exposed Sunnyside Trail ascent first, getting the significant climb out of the way. The return route often offers more shaded sections, which can be a welcome relief. Starting early in the morning is also a good strategy to avoid the midday sun and secure parking.

Given the length and difficulty, you should bring plenty of water, snacks, sturdy hiking shoes, sun protection (hat, sunscreen), and layers of clothing as conditions can change. A map or GPS device is also recommended, though the trail is well-defined.