The collection includes Collier’s extensive logging photograph collection; photographs, documents and letters documenting his World War I military service and family history materials. Alfred D. “Cap” Collier was a noted twentieth century lumberman and philanthropist in Klamath County, Oregon.

The Collier Memorial State Park/Logging Museum is located in southern Oregon. The Park contains one of the largest collections of logging equipment in the world. Collection contains an illustrated brochure on the proposed creation of the Collier State Park, published by the Friends of Collier Park.