Note: This campground is permanently closed. The description below reflects its historical condition based on camper reviews.
City lights visible from your sleeping bag, no car noise, no drive-up neighbors. That was the draw at Henninger Flat, a hike-in campground within Eaton Canyon Open Space in Altadena, where the roughly 3.5-mile climb up a forest service road filtered out most casual visitors. The route gains elevation steadily and runs largely exposed, so heat and sun were real factors on the approach, especially in summer. Campers who made the trip arrived at a multi-tiered layout with three distinct site clusters, each positioned differently relative to the views and tree cover.
The middle cluster gave the clearest sightlines west toward Los Angeles, and the city at night was the campground's defining feature. The upper cluster sat among more trees, which provided shade and good spots for hammocks but blocked the view. As tom P. put it, "you come here for the views and the evening breeze but not much else." Amenities were minimal: pit toilets, picnic tables, and a ranger station with a small museum. Water availability was inconsistent and required treatment when present, so carrying a full supply was the standard approach.
Bugs were a noted issue, and reviewers recommended head nets and insect repellent. Day hikers regularly passed through and occupied sites during daylight hours, but the campground tended to quiet down considerably by evening. Idlehour Trail Campground sits further along the trail and offers a creek-side setting for campers who want water access or a different overnight option.
Map & DirectionsHenninger Flat is located in California near Pasadena
Coordinates
34.19294858 N
118.08930667 W
Connectivity
- T-Mobile5GExcellent Coverage
- VerizonLTESome Coverage
- AT&T5GGood Coverage
Connectivity
- T-Mobile5GExcellent Coverage
- VerizonLTESome Coverage
- AT&T5GGood Coverage
Access
- Walk-InPark in a lot, walk to your site.
- Hike-InBackcountry sites.
Site Types
- Tent Sites
- Group
- Equestrian
Features
For Campers
- Trash
- Picnic Table
- Phone Service
- Reservable
- Toilets
- Alcohol
- Pets
- Fires
Drive Time
- 31 min from Los Angeles, CA
- 1 hr 9 min from Oxnard, CA
- 1 hr 38 min from Bakersfield, CA
- 2 hrs 5 min from San Diego, CA













