Boulder Skyline Traverse

The Boulder Skyline Traverse is considered a difficult to strenuous hike. It involves a substantial elevation gain of around 6,000 feet (1,800 meters) and features technical sections, including steep climbs like the one to South Boulder Peak via Shadow Canyon Trail, rocky descents, and even minor Class 2/3 scrambling on Bear Peak. It's a demanding route best suited for experienced hikers.

The trail offers a diverse 'mosaic of ecosystems,' ranging from open grasslands to mixed ponderosa pine-Douglas fir forests, rocky outcroppings, and mountain streams. While generally well-maintained, many sections are quite technical, rocky, steep, and narrow, featuring roots and loose gravel. You'll encounter both rolling ridgeline sections and very steep ascents and descents.

The traverse offers spectacular scenery. You'll get breathtaking views to the east overlooking Boulder, Denver, and the plains, and to the west, impressive vistas of the Indian Peaks Wilderness and the iconic Flatirons. Key highlights include the summits of South Boulder Peak, Bear Peak, and Green Mountain Peak. Other notable spots are Viewpoint Flagstaff Road and View of the Flatirons.

Due to its urban proximity, the traverse offers various starting and ending points. Parking can be found at different trailheads around Boulder, but it's crucial to arrive early, especially on weekends, as parking lots fill up quickly. Some popular access points include the South Mesa Trailhead, NCAR Trailhead, or Chautauqua Park, though specific parking availability and regulations vary. Consider using public transport or ride-sharing to avoid parking hassles.

The Boulder Skyline Traverse is located within Boulder Open Space and Mountain Parks. While there isn't a specific permit required for hiking the traverse itself, some trailheads, particularly Chautauqua, may have parking fees or require reservations during peak seasons. Always check the official Boulder Open Space and Mountain Parks website for the latest regulations and any potential fees before your visit.

Yes, dogs are generally allowed on most trails within Boulder Open Space and Mountain Parks, including sections of the Skyline Traverse. However, specific leash regulations apply. Dogs must be on a leash at all times unless they have a Voice and Sight Tag and are under effective voice control. Always carry waste bags and clean up after your pet. Be aware that some areas may have seasonal closures or restrictions for wildlife protection.

Late spring, summer, and early autumn are generally the best times. Late spring and summer bring vibrant wildflowers, while autumn showcases golden aspens. Be prepared for potential afternoon thunderstorms in summer. Winter hiking is possible but requires appropriate gear for snow and ice, as conditions can be challenging and trails may be slick or covered. Always check weather and trail conditions before heading out.

Yes, the route incorporates sections of several other trails. You will hike along parts of the Boulder Creek Trail, the Bear Peak West Ridge Trail, and the Ranger Trail. It also includes portions of the Mount Sanitas Trail and the Flagstaff Trail.

Given the length and difficulty, pack essentials for a full day hike. This includes plenty of water (there are no reliable water sources on the trail), high-energy snacks, a map and navigation tools (GPS device or app), sun protection (hat, sunscreen), layers of clothing for changing weather, a headlamp (just in case), and a first-aid kit. Sturdy hiking boots with good ankle support are highly recommended due to the technical terrain.

The Boulder Skyline Traverse is typically done as a point-to-point traverse, connecting various trailheads across the five peaks. While it's possible to create a loop by combining trails, the classic route is not a single loop. This means you'll need to arrange transportation at your endpoint or plan for a return trip using public transport or a shuttle service.

To manage the significant elevation gain and avoid the most strenuous climb at the end of a long day, many experienced hikers recommend starting at a southern trailhead like South Mesa or Shadow Canyon. This allows you to tackle the notoriously steep ascent to South Boulder Peak and Bear Peak when you're freshest. Also, be mindful of crowded sections, especially on weekends, and plan for an early start to secure parking and enjoy cooler temperatures.