Allenspark is an unincorporated town, a post office, and a census-designated place (CDP) located in and governed by Boulder County, Colorado, United States.

While it was first visited by Native Americans and later by trappers, Allen's Park—now spelled Allenspark—got its name from a miner who built the first cabin in the area.

[7] The village of Allenspark is situated on part of the original George Mack homestead, site of Crystal Springs, an excellent water source.

The land company filed a plat for the village on May 23, 1896,[9] and began selling small building lots.

The Clara Belle Mining and Reduction Co. attracted investors from as far away as Omaha, Nebraska, for what turned out to be a folly.

Meanwhile, tourism was booming, and farmers and miners alike found a better income catering to tourists during the summer months.

Allenspark remained primarily a summer destination until improved roads and modern technology made mountain living easier than it used to be.

[15] Allenspark is located in northwest Boulder County within Roosevelt National Forest in the Front Range of the Colorado Rockies.