The best running trails around Eldorado Springs

Embark on the Greenbelt Plateau, Community Ditch and Flatirons Vista Loop, a difficult jogging route spanning 12.2 miles (19.7 km) with a significant 1077 feet (328 metres) of elevation gain. You can expect to complete this challenging journey in approximately 2 hours and 21 minutes. As you jog, you will encounter a varied landscape, from smooth gravel paths to rocky singletrack and steep climbs, all while enjoying continuous panoramic views of the iconic Boulder Flatirons, especially from Flatirons Vista. The route also includes twisty, wooded sections along the Spring Brook Loop, adding diverse scenery to your run.

For your visit, the main parking lot is conveniently located off Highway 93. Be aware that while Boulder County residents may park for free, others might need to pay a day-use fee. Alternatively, free parking is available across the street at the RTD lot. This trail system is highly interconnected, offering you the flexibility to customize your jogging route, but remember that you will be sharing the trails with mountain bikers and hikers.

This route is situated within the expansive Boulder Open Space and Mountain Parks, an area known for its natural beauty and diverse ecosystems. The interconnected trail network allows you to easily extend or shorten your run based on your preference and fitness level. Keep an eye out for local wildflowers and grazing cows in certain areas, which add to the natural charm of the landscape.

Prepare for a challenging jogging experience on the Marshall Mesa Loop, a difficult 15.1-mile (24.4 km) route that takes about 2 hours and 34 minutes to complete. As you tackle the 928 feet (283 metres) of elevation gain, you'll be treated to expansive views of Boulder's iconic Flatirons. The trail winds through open fields and meadows, occasionally dipping into wooded sections with pine trees, offering a varied landscape for your run.

When planning your visit, you'll find ample parking, restrooms, and picnic tables conveniently located at the trailhead. Be aware that much of the route is exposed, so you should plan accordingly for sun protection, especially on warmer days. Dogs are welcome on the trail, often permitted off-leash if they are under voice control, making it a great option for jogging with your canine companion.

This multi-use trail is part of the Boulder Open Space and Mountain Parks, where you might even spot cattle grazing in the fields. Keep an eye out for local wildlife like red-tailed hawks soaring overhead or mule deer along sections such as the Greenbelt Plateau Trail. The Marshall Mesa Loop provides a rewarding challenge for experienced joggers looking for a scenic and engaging workout.

Embark on the Bear Peak & South Boulder Summit loop, a difficult jogging route that challenges you with a significant elevation gain of 3028 feet (923 metres) over 9.0 miles (14.4 km). This demanding loop takes you up two of Boulder's highest peaks, offering sweeping 360-degree views of the Colorado Front Range, the city of Boulder, and the iconic Flatirons from viewpoints like the Fern Canyon Trail ridgeline. You will traverse diverse terrain, from broad dirt paths to rocky sections with steep steps and jumbled boulders, passing through lush forests and burn zones, all achievable in about 2 hours and 43 minutes.

Planning your visit requires preparation for a strenuous workout. The route includes sections that involve scrambling over exposed ridges and very steep rock steps, particularly on the Fern Canyon Trail. While generally accessible, be ready for highly technical terrain that demands good fitness and experience. Parking is typically available at trailheads that access this popular route, but it's always wise to arrive early, especially on weekends, to secure a spot.

This loop is renowned for its dual summit experience, allowing you to conquer two prominent peaks in one outing. The varied landscape, from dense forest to open, rocky ridges, showcases the unique ecology of the Boulder Open Space and Mountain Parks. It is a favorite among local joggers seeking a rigorous challenge and unparalleled vistas, making it a standout option for those who appreciate a truly rewarding high-altitude effort.