The simple answer is yes, moose are found in Colorado, and their population is currently thriving across the state’s high-elevation habitats. This large mammal is one of the most sought-after wildlife sightings for visitors. The growing population has become well-established over the past few decades, expanding its range far beyond the original reintroduction sites.
The Shiras Moose of Colorado
The Shiras moose (Alces alces shirasi) is the subspecies found in Colorado. It is the smallest North American moose subspecies, yet remains the largest member of the deer family in the state. Adult males, or bulls, can weigh between 800 and 1,200 pounds and stand up to six feet tall at the shoulder.
Their coat is typically grizzled dark brown, often appearing black, and they have a long head, an overhanging snout, and a distinctive flap of skin called a bell hanging from the throat. Bull Shiras moose grow impressive, flattened (palmate) antlers that can reach five feet or more in width before being shed each winter. They are browsers, relying heavily on woody vegetation, particularly willow, and frequently wade into water to consume aquatic plants during warmer months.
Historical Presence and Population Growth
Historical records from the 1850s show moose were occasionally present in northern Colorado, wandering in as transient animals from Wyoming. However, they did not establish a stable, breeding population and were largely absent through the early 20th century. The modern population began with a systematic reintroduction effort initiated by Colorado Parks and Wildlife (CPW) in the late 1970s.
The primary reintroduction occurred in 1978, when 24 moose were transplanted from Utah and Wyoming into North Park, near Walden. Following this initial success, subsequent relocations were conducted across the state to further establish the population. Today, these efforts have resulted in a robust and rapidly expanding population, estimated at over 3,000 moose across Colorado. CPW manages this growth through ongoing monitoring and controlled hunting licenses designed to maintain ecological balance.
Where Colorado Moose Roam
Moose thrive in habitats that provide abundant willow and easy access to water sources, typically favoring riparian zones and dense forest edges at high elevations. The most concentrated population remains the North Park region, specifically Jackson County around Walden, which is designated the “Moose Viewing Capital of Colorado.” State Forest State Park, bordering North Park, is a reliably popular viewing location due to its extensive willow thickets.
Their range is continually expanding, with sightings becoming increasingly common in areas like Rocky Mountain National Park and along the Front Range. A significant population is found further south on the Grand Mesa. Other established areas include:
- The Laramie River drainage in northern Larimer County.
- The upper Rio Grande area in the San Juan Mountains.
Safe Viewing and Interaction Guidelines
Seeing a moose in the wild is rewarding, but remember they are large, unpredictable, and dangerous if approached. Moose do not perceive humans as predators, but they will aggressively defend themselves and their young, especially when startled or cornered. Maintain a substantial distance, ideally at least 75 feet (25 yards).
If a moose is encountered, watch for signs of agitation, such as laying its ears back, raising the hair on its back, or repeatedly licking its snout. If the animal displays these behaviors or starts to charge, run immediately and put a large, solid object between yourself and the moose. Never attempt to feed or pet a moose. Always keep dogs leashed, as moose view them as similar to predators like wolves, which can provoke an aggressive response.