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Jul 01, 2026

Twist in sprawling summer camp set for picturesque California valley

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Twist in sprawling summer camp set for picturesque California valley

By Nina Joudeh Published July 1, 2026, 4:55 p.m. ET

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A sprawling children’s summer camp planned for a picturesque Bay Area canyon has hit a major legal roadblock after opponents sued to stop the project, threatening to delay construction by at least 18 months.

The lawsuit challenges plans by Oakland-based nonprofit Mosaic Project to transform 37 acres along Cull Canyon Road in Castro Valley into an overnight nature camp featuring 12 cabins, a dining hall and a staff residence that would serve nearly 1,000 fourth- and fifth-grade students each year through summer and year-round programs, according to the San Francisco Chronicle.

Illustration of a proposed kids' nature camp with cabins, a main building, and a stream flowing through a rural setting. 4
A sprawling children’s summer camp planned for a picturesque Castro Valley canyon has hit a major legal roadblock after opponents sued to stop the project. Obtained by the CA Post

The site includes a creek, hiking trails and wooded hills, with more than 30 acres intended for outdoor activities.

Having already spent roughly $3 million developing the proposal after acquiring the property in 2018, the nonprofit said the camp is designed to bring together children from different backgrounds while encouraging them to experience the outdoors.

But nearby residents and a neighboring winery filed suit in Alameda County Superior Court in May, arguing the project does not adequately address environmental concerns.

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Illustration of the Mosaic Project camp with several cabins. 4
The lawsuit challenges plans by Oakland-based nonprofit Mosaic Project to transform 37 acres along Cull Canyon Road into an overnight nature camp. The Mosaic Project

The plaintiffs allege that the development could deplete groundwater relied on by neighbors, increase wildfire risk in the canyon and violate Alameda County land-use designations, despite the county supervisors approving the project’s conditional use permit. Their attorney declined to comment.

The legal challenge could stall the project for at least 18 months unless both sides reach an agreement.

The proposal has already faced years of scrutiny.

An Alameda County land-use board rejected the camp’s conditional use permit and environmental review in December despite staff recommending approval.

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