Idaho Springs to Mount Blue Sky (Evans) Summit

No, the Mount Blue Sky Scenic Byway (CO 5), which includes this cycling route, is closed for the entire 2025 season (from September 2024 until Memorial Day weekend 2026) due to roadway construction. This closure prohibits all motorized and non-motorized travel, including cycling.

When the road is open, the best time to cycle is typically from late June to early September. This period offers the most favorable weather conditions, as the road is usually clear of snow and ice, and the risk of afternoon thunderstorms is lower. However, always check current road conditions and weather forecasts before planning your ride, as high-altitude weather can be unpredictable.

For cyclists starting in Idaho Springs, there are various public parking areas available in town. Many riders find street parking or use designated lots, especially near the historic downtown area, which provides convenient access to the start of the route. Always check local signage for any parking restrictions or fees.

The route is primarily asphalt, but the surface can be quite rough, especially after Echo Lake, with potholes, cracks, and expansion joints. The climb is a continuous, steady ascent with an average gradient between 4.5% and 5.8%, and most grades falling between 4-7%. There are very few flat sections, making it a sustained uphill effort.

Yes, when the Mount Blue Sky Scenic Byway is open, there is typically a timed entry reservation system and a fee required for vehicles to access the upper sections of the road, managed by the U.S. Forest Service. Cyclists generally do not need a timed entry reservation, but it's always wise to check the official Arapaho & Roosevelt National Forests website for the most current regulations regarding fees and access for cyclists, especially as rules can change.

No, this route is consistently rated as "difficult" or "strenuous" and is not suitable for beginners. It demands a very high level of fitness due to the sustained length of the climb, the continuous uphill gradient, and the extreme altitude, where oxygen-deprived air makes the effort considerably more challenging. It's considered one of Colorado's most challenging road cycling climbs.

As you ascend through the different climate zones, you have a good chance of spotting various wildlife. Common sightings include mountain goats and Rocky Mountain bighorn sheep, especially in the higher alpine tundra sections above the timberline. Keep an eye out for other high-altitude species as well.

The route offers spectacular scenery and several notable points of interest. You'll pass by beautiful bodies of water like Echo Lake and Summit Lake. The ultimate destination is the Mount Blue Sky (Evans) Summit, which, at 14,130 feet, is the highest paved road in North America and offers expansive alpine views.

While dogs are generally allowed on leash in the Arapaho & Roosevelt National Forests, the Mount Blue Sky Scenic Byway is a paved road primarily used by vehicles and cyclists. Due to the extreme altitude, narrow shoulders, and high traffic (when open), it is not considered a suitable or safe environment for dogs, especially for the entire climb to the summit. It's best to leave your furry friends at home for this particular adventure.

Yes, while primarily a road cycling route, it does briefly intersect or run parallel to several other trails. You'll find sections that touch upon the ADT - Colorado C - Q - Seg 4, Excelsior Road, and Chicago Lakes Trail, among others. These are typically short overlaps or crossings rather than extended shared paths for cycling.

Given the extreme altitude and potential for rapidly changing weather, essential gear includes layers of clothing (even in summer), a windbreaker or rain jacket, plenty of water and nutrition, a well-maintained road bike with appropriate gearing for sustained climbing, and a helmet. Sunscreen and sunglasses are also crucial due to the intense UV exposure at high elevations. Be prepared for colder temperatures at the summit, even if it's warm at the base.