CDC: Gatherings and Community Events
https://www.cdc.gov/coronavirus/2019-ncov/community/large-events/index.html
Group Running: Operational Preparedness for COVID-19
https://files.constantcontact.com/6bc39c37001/c58ac600-9cfc-4e70-a275-ae53c483b946.pdf
RRCA Guidelines for Races
https://www.rrca.org/news-articles/news-archives/2020/05/03/looking-forward-guidelines-for-races
USATF LOGISTICAL INFORMATION AND GUIDANCE FOR EVENT DIRECTORS AND LOCAL ORGANIZING COMMITTEES
World Triathlon COVID-19 Prevention Guidelines for Event Organizers
Spartan New Safety Guidelines for Reopened Races (Post COVID-19)
Race Corral Calculator
https://overlandtiming.com/resources/race-corral-calculator/
Run Britain COVID-19 (Coronavirus) Guidance for Road Race and Multi-Terrain Race Organisers in the UK
file:///C:/Users/Mark/Downloads/UKA_runbritain_COVID19_v1%20.pdf
Chicago Area Runners Association (CARA) Group Running Operational Preparedness for COVID-19
Pikes Peak Marathon Covid-19 Logistics: Instructions, Maps, etc,