Pros & cons
PROS
- Easy-to-find slot canyons directly off the loop
- Vault toilets at the parking area
- Fun climber-watching on nearby walls
CONS
- Tiny parking lot fills fast on busy days
- Slot passages are tight and dark—skip if claustrophobic
Park at the Hall of Horrors parking area along Park Boulevard; small lot with vault toilets—arrive early on weekends and holidays.
Slots are narrow and dark with short scrambles—not ideal for claustrophobic hikers. Summer heat is intense; bring plenty of water and sun protection. Watch for climbers above and stay on marked paths.
Overview
This is a quick-hit Joshua Tree experience: a 0.6-mile total loop around a hulking boulder pile, dotted with Joshua trees and big desert sky. The loop itself is easy and nearly flat (think 50–100 feet of gentle gain), but the optional slot passages tucked inside the rocks are the headline attraction.
The Loop and the Slots
Start from the Hall of Horrors parking area on Park Boulevard (there are vault toilets). Head out on the obvious sandy path and go clockwise; it makes spotting the slot entrances a little easier. The slots are short, narrow corridors in the rock—expect tight squeezes, a bit of hands-on scrambling, and dim sections where a small flashlight or headlamp helps. If tight spaces aren’t your thing, skip the slots and enjoy the loop’s desert scenery and boulder views. You’ll likely see climbers on the surrounding walls and some lizards and birds darting between the Joshua trees.
What to Expect and Who It’s For
Plan about 1.0 hour if you poke around in the slots; the loop alone is much quicker. It’s a great stop for families and casual hikers who want an adventurous twist without a big time commitment. The walking is on sandy desert trail with occasional rocky bits near the formation; the slots add simple scrambling but nothing technical.
Tips and Essentials
The small lot fills quickly—arrive early or on weekdays if you can. Bring water and sun protection year-round; spring and fall have the most comfortable temperatures, while summer heat is no joke. A compact light makes the dark sections of the slots more fun and less guessy. Wear grippy shoes for the short scrambles. No pets on trails here, and please respect climbers and closures, stay on marked paths, and leave no trace.
Best Time to Hike
You can walk this year-round, but spring and fall offer the sweet spot of cooler temps and softer light. Early morning or late afternoon is best for photos and to beat crowds. Midday in summer can be brutally hot and glaring.
Bottom Line
Compact, quirky, and memorable. If you’re nearby, this loop is absolutely worth the detour—especially if you enjoy squeezing through rock corridors and watching climbers work the granite.
Where it starts
34.0004, -116.1468Wildlife on this trail
Near Hall of Horrors Loop
All places →All trails →
0 mi awayHall of HorrorsShort loop to hidden slot canyons and fun granite scramblingTrailhead · Parking
0.6 mi awayRyan Mountain TrailShort, steep climb to a signature 360-degree summit panoramaChallenging · 3 mi · 1.9 hr
0.9 mi awayRyan Ranch TrailQuick, sandy stroll to photogenic adobe ruins and desert historyEasy · 1 mi · 30 min
1.1 mi awayRyan RanchEasy walk to photogenic 1896 adobe ruins in open desertTrailhead · Parking
1.1 mi awayHeadstone RockIconic balancing boulder with classic easy-moderate climbs and big viewsParking · Restroom
1.2 mi awayCap RockEasy loop around a photogenic boulder stack topped with a “cap”Trailhead · Parking
1.2 mi awayCap Rock TrailIconic boulders and Joshua trees on a flat 0.4 mile loopEasy · 0.4 mi · 15 min
1.5 mi awayHidden Valley Nature TrailIconic one-mile loop through a granite amphitheater with interpretive signs.Easy · 1 mi · 36 min
