Check in will be at Fort Scott in the Presidio near the Golden Gate Bridge.

From there, inventories will hike to Upper Dragonfly Creek or along the Batteries to Bluffs Trail. The Batteries to Bluffs Trail is steep, so be prepared for a vigorous hike. Click on 'Sign Me Up' to see the schedule of inventories at this site and reserve a space.

Free, but reservations are required. Individual event times will vary.