The townsite is significant as the remains of a prosperous Roaring Fork Valley mining camp of the 1880s. Originally known as Castle Forks, the town of Ashcroft was incorporated in 1882. Its peak population of approximately 1,000 supported a variety of commercial enterprises.

The site, a loose cluster of individual habitation units surrounding several community structures, is believed to have been built and occupied between AD 1050 and 1150.  As one of the few "pure" large Pueblo II sites in Southwestern Colorado, it is important as a representation of the broad patterns of Mesa Verde Anasazi cultural change.  Listed under Great Pueblo Period of the McElmo Drainage Unit, AD 1075-1300, Multiple Property Submission.

Constructed in 1920, the one-story brick building is an example of the simple architectural design typically found in a Pentecostal church design. 

The 1910 red brick building is a well-preserved example of an early 20th century Gothic Revival style church which continues to blend well with its surrounding urban residential neighborhood.

The Berkeley School is associated with the educational history of the Berkeley community from 1894 through 1976. 

The 1905 Bennett-Field House is architecturally significant as it embodies distinguishing characteristics of the Neo-Classical Revival style designed by noted Denver architect William Fisher. 

The Denver architectural firm of Fisher and Fisher designed the Georgian style house for Lawrence C. Phipps in 1932.  Phipps amassed a fortune as an executive of Carnegie Steel before moving to Denver in 1901 where he became a leader in public affairs.

The 1881 Baur Building housed the most popular and longest-lived confectionery, catering, and restaurant firm in Denver.  Established in 1871 by German immigrant Otto P. Baur, the company quickly emerged as an innovative and successful purveyor of candies, cakes, and other confectionery items. 

Bats Grocery Store, a one-story, rectangular building of soft brick and wood frame construction, is an early 20th Century Commercial Style structure built in 1903 by H.C. Donneker & Co.

Bastien’s Restaurant is an important representative of the Googie style.  This 1958 building reflects a local interpretation by a Colorado architect of the Googie movement that originated in Southern California for coffeehouse design in response to the growing automobile culture, new materials and technologies, and space age visions of the future.