Chicago Lakes Trail

The Mount Blue Sky Recreation Area, which includes the trailhead for the Chicago Lakes Trail, is currently closed until 2026 due to road construction. This means direct access to the trailhead and parking is unavailable during this period. Please check official Forest Service websites for the most up-to-date information before planning your trip.

The Chicago Lakes Trail offers a challenging and varied terrain, particularly suited for experienced trail runners. You'll encounter abundant rocks and roots, often exceeding eight inches in height. Sections can be steep, muddy, and involve navigating large boulders. The path to the second Chicago Lake, which is above treeline, becomes difficult to follow and is very steep and technical, requiring careful footing. The final push to Summit Lake is also described as very steep and technical.

Yes, dogs are generally allowed on the Chicago Lakes Trail. However, as it is located within a wilderness area, dogs must be kept on a leash at all times to protect wildlife and ensure a pleasant experience for all trail users.

Typically, there is no specific permit required for hiking or jogging the Chicago Lakes Trail itself. However, the Mount Blue Sky Recreation Area, which provides access to the trailhead, usually has an entrance fee. Given the current closure until 2026, please verify any fee requirements once the area reopens.

The best time to jog the Chicago Lakes Trail is generally from late spring to early fall (June through September), once the snow has melted and before new snowfall begins. This period offers the most accessible conditions and the chance to see abundant wildflowers. Fall also brings beautiful colors to the lower sections of the trail. Always check weather forecasts, as high-altitude conditions can change rapidly.

The Chicago Lakes Trail is approximately 17.4 kilometers (10.8 miles) long with significant elevation gain. For an experienced trail runner, the route can take around 2 hours and 45 minutes to complete. However, due to the challenging terrain, high altitude, and potential for scenic stops, many runners may take longer. It's crucial to factor in acclimatization time and your fitness level.

This trail offers breathtaking scenery. You'll pass several stunning glacial lakes, including Echo Lake, Idaho Springs Reservoir, and the beautiful Upper & Lower Chicago Lakes, culminating at Summit Lake. You'll also enjoy views of towering peaks like Mount Blue Sky, Mount Warren, and Mount Spalding, pass through an old burn area with abundant wildflowers, and encounter cascading mountain creeks and alpine meadows.

The Chicago Lakes Trail is home to diverse wildlife. Keep an eye out for bald eagles soaring overhead, especially near the lakes. You might also spot various small rodents and other alpine creatures. Remember to observe wildlife from a distance and avoid disturbing their natural habitat.

No, this trail is rated as difficult and is not recommended for beginners or those new to high-altitude running. The entire route is above 10,000 feet, with significant elevation gain and very steep, technical sections. Acclimatization to the high altitude is crucial, and a good level of fitness and trail running experience is essential for safely enjoying this challenging route.

The nearest town with amenities is Idaho Springs, located a short drive from the Mount Blue Sky Recreation Area. In Idaho Springs, you can find various cafes, pubs, and accommodation options. However, please remember that the trailhead area itself is currently closed until 2026.

Yes, the route primarily follows the Chicago Lakes Trail for a significant portion. It also passes through sections of the Echo Lake Trail, Summit Lake Trail, and the Mount Blue Sky Ridge Trail, offering connections to other parts of the wilderness area.