Yes. Mariners Island Park in San Mateo has an all-gender restroom.
735 Fathom Drive, San Mateo, CaliforniaVerifiedby community-sourced import · Dec 21, 2014How checks work
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Restroom
All-gender: Yes · Wheelchair access: ADA accessible
Across from the jungle gym Park is free and open to the public. Restroom unlocked 7am-8pm Apr to Oct and 7am-6pm Nov to Mar
4.5 on Google from 113 ratings, for the business overall, not the restroom.
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From Google, last updated Apr 24, 2026
From Google
Listing information, not Allgenda verification. Last updated Apr 24, 2026.
Place data © Google, shown under Google's terms. Allgenda adds the checks, restroom records and community notes.
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15870updated upstream Dec 21, 2014ChIJ-ygEIcCej4ARWkBkX_U-DOI