From Sunday Streets:

Sunday Streets in the Mission is one of the most popular and populous events, drawing crowds from all over the city and the region to bike, walk, and explore the neighborhood. Since 2009, Sunday Streets has held at least one event a year in the Mission. This year, we’re excited to expand the Valencia St. portion of the route north to the McCoppin Hub and south to 26th St. Additionally, this year Mission Sunday Streets will activate 18th St. between Guerrero St. and Treat Ave.