Bob Walker of Burbank and Susan Aldrich of Los Angeles hike a Griffith Park trail, with the lights of the city forming gleaming streaks in the distance. (Anne Cusack / LAT)
Starting off on a hike, a Sierra Club Thursday evening group leaves cars behind in a lot near the Griffith Park merry-go-round. (Anne Cusack / LAT)
Griffith Park night hikers take in 360-degree views above Mt. Hollywood. (Anne Cusack / LAT)
