(Virtual) Marin County Half Marathon, 5k, and 10k June 17, 2020April 18, 2024 BLFR Site Administrator Calendar When: August 1, 2020 – August 31, 2020 all-day2020-08-01T00:00:00-07:002020-09-01T00:00:00-07:00Part of the BLFR Race Series 2020. website: http://marinmarathon.com/virtual/