The Dahlia Dell Picnic Area is located near the Conservatory of Flowers. There are several paths that lead to the picnic site - look for a paved path with flags!
If you are driving, please remember JFK will be closed! The closest parking will be on Conservatory Drive or Fulton St. (GGP road closures)
For public transportation, SF MUNI bus routes 5, 21, and 33 go by the northeast corner of the park. The N/Judah goes along the southern edge of the park.
Call if you are lost!