View from Johnston Ranch uplands looking towards Half Moon Bay. (Leigh Ann Gessner)

Johnston Ranch Property

Midpen is partnering with the City of Half Moon Bay and the nonprofit Peninsula Open Space Trust (POST) to continue protecting the Johnston Ranch property, on the south edge of Half Moon Bay, as open space and farmland. The 868-acre property, once slated for a golf course, is currently owned by POST. The City of Half Moon Bay owns the historic Johnston House located on the property.

Midpen is considering purchasing a partial interest (59%) in the property for $4.8 million that will allow us to become co-owners with POST. If the Midpen board approves the partial interest purchase, a lot line adjustment application would be filed with the County. In time, Midpen would fully own 644 acres of the upland portions of the property and POST would retain ownership of 224 acres containing prime agricultural land for future sale to a farmer, permanently protected from development by a conservation easement

Map of Johnston Ranch property.
Icon of shaking hands with a mountain in the background.
Land Preservation
illustration of the sun setting over hills
illustration of a bird in flight next to the letters MAA
Measure AA


NOV. 10, 2021, 7 P.M.

At this virtual meeting, Midpen’s board of directors will vote on whether to approve the proposed partial interest purchase of a 644-acre upland area of the larger Johnston Ranch property near Half Moon Bay from Peninsula Open Space Trust (POST).

The staff report, meeting agenda and information on how to comment and participate will be posted by 5 p.m. on Friday, November 5 at

Goals and Objectives

Midpen has been working on the San Mateo County Coastside since 2004 to protect open space, restore the natural environment and preserve working lands and rural character. To date, Midpen has preserved more than 11,000 acres of natural and agricultural lands on the coast. The proposed partial-interest purchase of the Johnston Ranch Property uplands aligns with: 

  • Midpen's Coastal mission to acquire and preserve in perpetuity open space land and agricultural land of regional significance, protect and restore the natural environment, preserve rural character, encourage viable agricultural use of land resources, and provide opportunities for ecologically sensitive public enjoyment and education.
  • Midpen's community-supported Vision Plan Portfolio #1 Miramontes Ridge: Gateway to the Coast Public Access, Stream Restoration and Agricultural Enhancements.

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The proposed partial-interst purchase would protect 1.2 miles of Arroyo Leon creek (tributary to Pilarcitos Creek) that provides potential spawning and rearing habitat for steelhead trout. It also provides opportunities for new community connections to nearby nature by expanding and connecting local trail systems. The City of Half Moon Bay is working on a pedestrian/bike trail that connects nearby Higgins Canyon Rd. to downtown. 

Future opportunities, that would require a public process and environmental review, include: 

  • Easy-access loop trail near Johnston House. 
  • Access into Midpen’s existing and adjacent Miramontes Ridge Open Space Preserve, which currently has no public access due to geographic isolation. 
  • Connections to existing trails in adjacent Burleigh Murray Ranch State Park.
Funded by Measure AA 2014 Open Space Bond


This project is funded by Measure AA, a bond passed by local voters in 2014.

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