End of 100 Mile Challenge

Sat · Oct 31·5 AM·Event Location, San Francisco

Cycle track open until 7:30 AM at Event Location, San Francisco.

Sat · Oct 31·8:30 AM – 4:30 PM·San Francisco, CA (Farallon Islands)

Eight‑hour naturalist‑led whale watching expedition sails from San Francisco under the Golden Gate Bridge to the Farallon Islands, featuring an expert naturalist, $320 per person, ages 13+.

Sat · Oct 31·8:30 AM – 9:15 AM·Marina, San Francisco Public Library

Relaxed postures and gentle breathing exercises taught in English and Mandarin in the library courtyard, accessible via the playground walkway, for ages 18 and up.

Sat · Oct 31·9 AM – 12 PM·Presidio Trust · San Francisco

Presidio Habitat Stewards at Presidio Trust in San Francisco.

Sun · Nov 1·Aquatic Park, San Francisco, CA

Angel Island Regatta (Aquatic Park, San Francisco) — Open water swim at Aquatic Park.

Sat · Nov 7·Aquatic Park, San Francisco, CA

Open water swim at Aquatic Park, San Francisco.

Sat · Nov 14·Aquatic Park, San Francisco, CA

Open water swim at Aquatic Park accompanies the Pilot Appreciation Dinner.

Sat · Nov 14·10 AM·Aquatic Park, San Francisco, CA

Veterans Day Swim (Aquatic Park, San Francisco) — Open water swim at Aquatic Park.