Vernal Pool Tours at Warm Springs Unit on Don Edwards San Francisco Bay National Wildlife Refuge

Sign up to receive notification of when Vernal Pool Tours are available. These popular tours to view wildflowers and endangered plants occur in an area normally closed to the public due to the sensitivity of the habitat. Tours are free of charge.

You will learn about the unique features of a vernal pool grassland, and hopefully observe the pools in what will likely be a good rain year! Participants will see endangered Contra Costa goldfields (Lasthenia conjugens), Downingia pulchella, several Plagiobothrys, and other native vernal pool and upland species.

Warm Springs Unit is located in south Fremont. The walking tour will last about 1.5 to 2 hours. Total walking distance will not exceed one mile, but terrain is uneven.

To optimize the botanical beauty of the tours, we will set the tour dates three weeks before the peak bloom. Typically, tours are in April and will be conducted on one Saturday and one weekday with two tours on each day. Once dates and times are determined, you will receive email notification on how to register and driving directions. Spaces are limited.

Sign up now! Email Ivette Loredo at to be put on the notification list.