Measuring just 15 miles long, the Platte River Mountains are north of the Kenosha Mountains and are a sub-range of the Front Range consisting completely of gentle summits.

Measuring just 15 miles long, the Kenosha Mountains are a sub-range of the Front Range and are nestled between the Platte River Mountains to the north and the Tarryall Mountains to the south. The Kenosha Mountains are home to several 12,000 and 11,000 ft. summits and lie completely within the Lost Creek Wilderness Area. Most summits in this mountain range are not officially named; however, Gerry and Jennifer Roach, of Colorado mountaineering fame, have provided several summits in the area with alphabetically-themed appellations such as "Peak X," "Peak Y," and "Peak Z." Due to the lack of relatively high summits as compared to other regions, the Kenosha mountains offer hikers and climbers solitude within one of the most under-appreciated Wilderness areas in Colorado.

The Vasquez Mountains are a sub-range of the Front Range. This range is "L-shaped" and is home to several rarely-hiked summits. Most summits in the Vasquez Mountains are near 12,000 ft in elevation, offering solitude. Two Wilderness Areas lie within the confines of these mountains: the Vasquez Peak Wilderness in the south and the Byers Peak Wilderness in the north. The Vasquez Mountains begin at Berthoud Pass and the Fraser River Valley and extend west to the Williams Fork River, and then north to Bottle Peak.  Generally speaking, the Vasquez Mountains are gentle; however, some areas on the eastern side of the range consist of prominate glaciated cirques.

Puma Hills is a sub-range of the Front Range. The terrain within Puma Hills is full of interesting outcroppings, old mining claims, and vertical rock features. A climber can spend many outings here as the area offers many very fun class 4 and 5 rocks that may not be listed as summits on summit lists. There is a tremendous amount of camping and bouldering in this area; however, caution should be taken due to the large use of this area by hunters and ATV and motorcycle users. Many of the campsites have been completely ruined or destroyed by careless recreational users - please be responsible and take care of the area.

Rampart Range is a sub-range of the Front Range. Rampart Range spans the area north of Pikes Peak and terminates west of the city of Castle Rock. As seen below, one prominent and popular feature within Rampart Range is Rampart Reservoir, one of the main sources of water in the Pikes Peak region. Rampart Reservoir lies between the United States Air Force Academy and Woodland Park.

The Front Range of Colorado is perhaps the most well-known mountain range in Colorado due to its proximity to three major metropolitan areas: Denver, Colorado Springs, and Ft. Collins. The Front Range is comprised of several sub-ranges, including Rampart Range, Kenosha Mountains, Platte River Mountains, Tarryall Mountains, Puma Hills, Vasquez Mountains, Laramie Mountains, Rocky Mountain National Park, Never Summer Mountains, Medicine Bow Mountains, Mummy Range, Williams Fork Mountains, and the Indian Peaks. Additionally, the Front Range covers roughly 7,000 square miles and spans more than 175 miles North-to-South, making it Colorado's longest mountain range.