The San Diego chapter of the Sierra Club has sent a formal demand letter to the City of San Diego to immediately cease and redress the continuing intensification of unmitigated impactful uses of land in the San Dieguito River Valley.

The Sierra Club filed its lawsuit in December 2025 in response to the San Diego City Council’s October vote to gut the 1983 grant deed restrictions and open-space protections over the former polo fields leased by Surf Cup Sports since 2016. The City also voted to amend the lease to exempt their long-term tenant’s commercial activities from any environmental review under the California Environmental Quality Act (CEQA). The Sierra Club alleges these actions directly violate CEQA by failing to analyze and mitigate the impacts of Surf Cup Sports’ intensified commercial use of the fields on traffic, open space, and the surrounding ecosystem.

Click here or on the link above to read the letter.