The summit of Sonoma Mountain, the county's 2,463-foot-high landmark vista, will be purchased by the county's Open Space District under a $10 million deal approved Tuesday by Sonoma County supervisors.
"We are fortunate to have the opportunity to purchase this significant property and create an unbroken band of 5,500 acres of publicly protected land on Sonoma Mountain," Valerie Brown, the county supervisor representing Sonoma Valley, said in a statement.
Wendy Eliot, conservation director of the Sonoma Land Trust, said the 283-acre acquisition adds Sonoma Mountain to the list of publicly owned Bay Area peaks that includes Mount Tamalpais, Mount St. Helena, Mount Diablo and San Bruno Mountain.
"Now, they'll be able to hike to the top of Sonoma Mountain, too," she said.
Officials said it was too early to predict when the public will have access to the mountaintop, which rises above Petaluma to the west and Glen Ellen to the east. Acquisition also fills in a missing piece of the patchwork of properties on the ridge that runs 25 miles from San Pablo Bay to Bennett Valley.
For about 150 years, the site known as Sonoma Mountain Ranch has been owned by the Stevenson family, which reportedly obtained it in a presidential land grant. Since the death of John L. Stevenson a decade ago, the property has been in probate court with Oakland attorney Michael Walsh acting as executor.
Eliot said the sudden availability for purchase in September prompted the Land Trust to put down $125,000 to secure a contract to buy the ranch. A number of properties on the slopes of Sonoma Mountain have deed restrictions that prevent public access, but the ranch was not one of them.
Officials with the Land Trust, a private nonprofit agency dedicated to bringing private lands into the public realm, and the county Agricultural Preservation and Open Space District, funded by a quarter-cent sales tax, said the effort to secure Sonoma Mountain constituted an acquisition partnership that had worked effectively earlier this year in putting the Jenner Headlands in the public domain.