Collier Memorial State Park, State park and logging museum in Chiloquin, Oregon, United States

Collier Memorial State Park is an outdoor museum and state park in Chiloquin, Oregon, displaying a large collection of antique logging equipment from the late 19th and early 20th centuries. The exhibits are arranged in an open-air setting along a forested riverside trail that visitors can walk at their own pace.

Alfred and Andrew Collier, brothers from Klamath Falls, donated 146 acres along the Williamson River in 1945 to honor their parents, Charles Morse Collier and Janet McCornack Collier. In 1947 they added a collection of antique logging equipment, shown outdoors as a logging museum. Alfred kept adding pieces until his death in 1988, and a 2005 renovation restored machinery, railroad equipment and historic buildings.

The museum grew from a collection of antique logging equipment that Alfred and Andrew Collier donated in 1947, and Alfred kept adding pieces until his death in 1988. Twelve authentic pioneer homestead buildings and relocated logging camp structures show how Oregon families lived and the 19th-century building techniques they used.

Camping runs April through October, with 50 RV hook-up sites, 18 tent sites and four horse corrals; sites are first-come, first-served, not bookable in advance. Camping closes November through March because of cold, snowy winters. Modern restrooms, hot showers and laundry facilities are on site, and a trailhead leads to forest trails and a horse trail to Jackson F. Kimball State Recreation Site.

The Williamson River and Spring Creek meet inside the park, making this a well-known spot for trout fishing in southern Oregon. This means visitors can walk from an old steam-powered log hauler directly to a riverbank without leaving the park grounds.