The Sonoma County Board of Supervisors unanimously authorized the use of $1.8 million in open space funds Tuesday to purchase 199 acres atop Fitch Mountain in Healdsburg.

The top of Fitch Mountain, the scenic backdrop to Healdsburg, is set to be purchased for use as a park, capping a decade-long effort to preserve it for public access.

Negotiations have hit a snag to acquire Healdsburg’s Fitch Mountain and create a nature preserve with public hiking trails, frustrating county and city officials.