In 1971, retired teacher Margaret Minshall donated over 400 acres to San Diego County; the land is now Oakoasis Open Space Preserve

Land transfers often outlast the people who make them, and Margaret Minshall's are a good example. She was a retired high school teacher and avid equestrian. In 1971, she gave more than 400 acres of her Oakasis Ranch, near the San Vicente Reservoir, to the County of San Diego. Four years later, in 1975, she transferred another 41.67-acre parcel to California State Parks, strengthening the northeastern edge of Cuyamaca Rancho State Park. Her name lives on in a hiking trail, and her ranch house, destroyed in the 2003 Cedar Wildfire, stood in what is now the Oakoasis Open Space Preserve.Margaret Minshall: Retired high school teacher behind two public land transfersThe state's historic background study ‘Cuyamaca Rancho State Park, Historic Background Study & Historic Inventory’ describes Margaret Minshall as a retired high school teacher and avid equestrian who was known as "Mardy" or "Marti". By the mid-1970s, she lived in the former residence of Harvey Moore, the first custodian of Cuyamaca Rancho State Park, near the old Stonewall Mine area. She was engrossed in tireless volunteering, particularly in founding the park's interpretation association. Her story appears briefly in a document by Alexander Bevil, a historian with California's Department of Parks and Recreation, who wrote the study in February 2014 as an overview of the park's historic events, locations and individuals.Minshall’s 1971 transfer of more than 400 acres of Oakasis RanchIn 1971, Minshall donated more than 400 acres of her former Oakasis Ranch, near the San Vicente Reservoir, to the County of San Diego. The study describes this as the same arrangement she later made with the state. According to its bibliography, the San Diego Union reported the transfer on 28 August 1971, describing a 400-acre park given to the county. Decades later, the 2003 Cedar Wildfire destroyed her ranch house in what is now the Oakoasis Open Space Preserve.The 1975 transfer of 41.67 acres to California State ParksOn 22 April 1975, California State Parks acquired 41.67 acres from Minshall next to the old Stonewall Mine area. As part of the transfer, she kept the right to reach her home, the former Harvey Moore residence, and her barn over an existing road for the rest of her life. The acquisition helped consolidate the park's northeastern boundary, creating a buffer around the lower Stonewall Mine area and better connectivity there. The mine itself was one of the richest in Southern California, eventually producing about $1 million in gold bullion. A collapsed pit, stone foundation ruins, tailings piles and scattered machinery still mark its site.The Minshall Trail at Lake Cuyamaca and the lasting legacy of Margaret MinshallCalifornia State Parks honoured Minshall by dedicating the Minshall Trail in her name, in appreciation of her generosity and tireless volunteering. The former Lake Loop Trail passes the site of her residence, runs around the southwest shore of Lake Cuyamaca and links the Stonewall and Kelly Ditch Trails. It is one of three trails named after people who played key roles in the park's development, alongside the Harvey Moore Trail and one for Vern Whitaker, an honorary State Parks ranger and exemplary volunteer. The study adds that wildfires remain the greatest threat to the park's historic resources, citing fires such as the October 2003 Cedar Wildfire, which burned over Japacha Ridge.You use AI every day. Now get your AI Quotient. Take the AIQ test.