Sarah Thomas - Round-Trip Angel Island

Clockwise loop around Angel Island from Aquatic Park

16.1 km (10.0 miles)

6 hours, 9 minutes on 26 June 2019

Observed and documented by Evan Morrison



  • Name: Sarah Thomas
  • Gender: female
  • Age on swim date:
  • Nationality: United States
  • Resides: Conifer, Colorado

Support Personnel

  • Brent McLain - pilot
  • Robin Rasmussen Rose - crew
  • Evan Morrison - obsevrer / documentation

Escort Vessel: Tango (San Francisco (Hyde St))

Swim Parameters

  • Category: Solo, nonstop, unassisted.
  • Rules: MSF Rules of Marathon Swimming, without exception or modification.
  • Equipment used: Swimsuit, silicone cap, goggles.

Route Definition

Start @ SERC/Dolphin beach in Aquatic Park, exit through Aquatic Park opening, clockwise around Angel Island, return to SERC/Dolphin beach via Aquatic Park opening.

  • Body of Water: San Francisco Bay
  • Route Type: island loop
  • Start & Finish Location: Beach between SERC & Dolphin Club docks, Aquatic Park, San Francisco (37.808145, -122.421402)
  • Minimum Route Distance: 16.1 km (10.0 miles)


LongSwimsDB: Round-Trip Angel Island

Swim Data

  • Start: 26 June 2019, 04:09:49 (America/Los_Angeles, UTC-7).
  • Finish: 26 June 2019, 09:19:54
  • Elapsed: 6 hours, 9 minutes, 5 seconds.

Summary of Conditions

Feature Min Max
Water Temp ()    
Air Temp ()    
Wind ()    

GPS Track

Trackpoint frequency: 30 minutes. Download raw data (CSV).

Speed Plot

Nutrition: Carbo Pro flavored with apple juice. First feed at 1 hour, then every subsequent half-hour.

Observer Log

Download PDF



Click to enlarge.


Sarah Thomas - Round-Trip Angel Island from MSF on Vimeo.