In 1980, a real estate developer had proposed building a golf course and a number of new homes atop Pleasanton Ridge.

The report stated that prior to the purchase, the regional park contained 7,500 acres (30 km2) of land.

The acquisition was supported by the Priem Family Foundation, which is dedicated to preserving open space in the greater Bay Area.

[5] EBRPD claimed that the Tyler Ranch acquisition marked the occasion when the district acquired 100,000 acres since it was formed in 1934.

[13] The United States Geological Survey (USGS) Geographic Names Information System, however, includes Pleasanton Ridge as part of the Diablo Range in its list of GPS coordinates for the latter.