Marin County Parks plans to restore, maintain and patrol several West Marin open-space destinations as part of a $5.2-million vision enabled by a quarter-cent sales tax passed last year. The Measure A plan was presented to the Marin County Board of Supervisors for the first time on Tuesday. Though the board will not vote on a final budget for the parks department until June, supervisors authorized the hiring of the first park ranger to be stationed in West Marin to patrol areas including Upton Beach, Stinson Beach Village Green, Agate Beach, Bolinas Park, Chicken Ranch Beach and Whitehouse Pool. Officials are also looking to make repairs at Bolinas Lagoon and on the storm-damaged Rift Zone Trail near Vedanta Retreat in Olema. The parks plan includes trail and fire-road improvements at Cascade Canyon and Roy’s Redwoods that officials say will help protect endangered steelhead and coho salmon populations. Bolstering the Roy’s Redwoods trails, for instance, could reduce erosion into Lagunitas Creek waterways. Parks officials hope to replace deteriorated picnic tables, barbecues, trash cans and other facilities throughout their properties. Of the $9.8 million to be raised annually for nine years by Measure A, the remainder will be spent on preserving new open space, agricultural preservation and other local programs, including those in Muir Beach and Tomales.