The Marin Wildfire Prevention Authority is working with local and federal agencies to clear evacuation routes along Highway 1 in Muir Beach and a fire road in Inverness and to create a shaded fuel break along the northern boundary of Stinson Beach, marking the first time the agency will conduct evacuation route clearing in the coastal zone and the first defensible space project in Stinson Beach. The Muir Beach and Stinson Beach projects fall within the Golden Gate National Recreation Area, and are clearing necessary environmental reviews. In a wildland fire emergency, the buffer zone created by a shaded fuel break allows firefighters more time to fight the fire. The evacuation route in Inverness, from the top of Perth Way over to Bishop Pine Preserve Road, began this week. The project encompasses a small portion of a dirt fire road and is funded by local monies from M.W.P.A. meant for community-level wildfire prevention. The evacuation route in Muir Beach, immediately north of Highway 1, encompasses nearly 37 acres of land consisting of coastal scrub, dense mixed woodlands and a small section of eucalyptus. Funding for the project comes from Measure C core funds, which are allocated for cross-jurisdictional projects. Chris Gove, chief of the Muir Beach Volunteer Fire Department, said he hopes work will begin by the end of this month. In Stinson Beach, a shaded fuel break will be created on federal parkland extending from the intersection of Avenida Balboa and Calle del Mar about 650 yards along Willow Camp Fire Road. The project will include limbing Monterey pines, thinning native shrubs and removing invasive pride of Madeira. Jesse Peri, chief of the Stinson Beach Fire Protection District, said the project will likely cost $50,000 to $70,000 and will be paid for by the district’s local M.W.P.A. funds. It will be the first time his department will spend local funds provided by the authority for defensible space projects. The fuel break was originally slated for the 2021-22 fiscal year, but the environmental review took longer. With more funds available from the current year’s budget, Stinson Beach Fire was able to expand the project. Mr. Peri said the work may be contracted to M and M Tree Service and will likely be completed six months from now. Both the Stinson and Muir Beach projects must comply not only with the California Environmental Quality Act but also with the National Environmental Policy Act, as the work will take place on federal lands. The Muir Beach Volunteer Fire Department’s CEQA exemption was approved and Stinson Beach’s approval is forthcoming, said Anne Crealock, the project and planning manager at the M.W.P.A. Both went through an environmental review by G.G.N.R.A. and were determined to be consistent with the recreation area’s fire management plan, which itself has a programmatic consistency determination from the California Coastal Commission. “It’s been a great exercise in having these entities work together,” Ms. Crealock said. To ensure that no habitats are harmed during the work, the M.W.P.A. will coordinate with the National Park Service to manage crews and biologists, while ornithologists will conduct resting bird surveys in both locations.