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Sobrante Ridge Regional Preserve

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History

The land on which SRRP lies was once part of the Rancho El Sobrante grant that the government of Mexico gave to Juan Jose Castro. Although the cited source gives 1840 as the date of the grant, several other sources say that the grant was made in 1841.

The site was owned in more recent times by Cutter Laboratories, a Berkeley-based pharmaceutical company. Cutter raised horses and cattle on the property, using blood from the animals to produce vaccines for diphtheria and tetanus. The German pharmaceutical company bought the entire Cutter company in 1974. Part of the Sobrante Ridge property was dedicated to EBRPD by a local construction company in 1980.

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