National Park Service — Yosemite National Park, CA, CA
volunteer
Source: Publicly Sourced
Volunteer will be stationed at a backcountry trails camp and will be expected to perform the duties of an entry-level trail worker. Duties will include basic trail maintenance and construction tasks, as well as camp chores. Volunteer is expected to abide by the Yosemite Trail Crew's standard safety protocols and represent the Park and program in a professional manner.
Apply on the official agency site (link above).