5.0
(2327)
18,814
riders
01:40
17.5km
290m
Mountain biking
This 10.9-mile mountain biking loop in Rim Rock Open Space offers moderate terrain, flowy singletrack, and expansive views near Fort Collins
Last updated: February 26, 2026
Waypoints
Start point
Parking
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1.14 km
Highlight (Segment) • Trail
Tip by
7.73 km
Highlight (Segment) • Trail
Tip by
17.5 km
End point
Parking
Way Types & Surfaces
Way Types
16.5 km
709 m
272 m
< 100 m
Surfaces
17.1 km
291 m
< 100 m
< 100 m
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Elevation
Highest point (1,760 m)
Lowest point (1,660 m)
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Weather
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Today
Saturday 9 May
23°C
6°C
13 %
Additional weather tips
Max wind speed: 23.0 km/h
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This route was planned by komoot.
The Blue Sky and Indian Summer Loop is accessible from various points within the Rim Rock Open Space. Popular parking options are typically found near the Devil's Backbone Open Space or other trailheads that connect to the Blue Sky Trail. Always check local signage for specific parking regulations and availability.
As this loop is located within the Rim Rock Open Space, managed by Larimer County, there may be specific regulations or fees depending on the access point. It's always best to check the official Larimer County Natural Resources website or local signage for the most current information regarding permits or entrance fees for the area.
The overall loop is generally considered intermediate. While the Blue Sky Trail (Northern Section) portion is often described as flowy and suitable for beginners, the addition of the Indian Summer Loop introduces more challenging climbs and descents, elevating the difficulty. Beginners comfortable with some moderate climbing and technical sections might enjoy it, but pure novices might find the Indian Summer section demanding.
The trail primarily features flowy singletrack with smooth, packed dirt. You'll encounter rolling terrain, curvy sections, and moderate climbs. While mostly clear, some sections may have a few rocks and occasional 'steps' that can be technical. Be aware that certain downhill sections can have loose sand, especially in turns.
This mountain bike loop, covering approximately 17.5 km (10.9 miles), typically takes around 1 hour and 40 minutes to complete. This duration can vary based on your fitness level, riding speed, and how often you stop to enjoy the views.
The loop traverses an open landscape, offering expansive views of Fort Collins and the surrounding rolling hills and mountains. You'll also get glimpses of the geological features of the Devil's Backbone area. Due to its exposed nature, there's little shade, ensuring uninterrupted vistas.
Yes, the Blue Sky Trail acts as a significant corridor, connecting to a vast network of other trails and open spaces. This route specifically incorporates sections of the Blue Sky Trail and the Indian Summer Trail. It also intersects with or runs alongside parts of the Inlet Bay Trail, Indian Creek Road, and Rim Rock Trail, allowing for extended ride options.
Generally, dogs are allowed on trails within Larimer County Open Spaces, but they must be kept on a leash at all times. Always check specific regulations at the trailhead or on the Larimer County Natural Resources website, as rules can vary or change.
The trail is popular during the 'Indian Summer' months (late summer to fall) for its pleasant temperatures and clear skies. However, due to its exposed nature, it can be ridden year-round, though summer rides might be very hot due to lack of shade. Spring and fall offer ideal conditions.
Be prepared for significant sun exposure as there is very little shade. The trail can also have several blind corners, so ride cautiously, especially on weekends when it can be busy. There is also a possibility of encountering rattlesnakes, so stay vigilant and give wildlife space.
Given the sun exposure and moderate length, bring plenty of water, sunscreen, and appropriate sun protection (hat, sunglasses). A helmet is essential for mountain biking. Snacks are recommended for energy, and basic bike repair tools are always a good idea.