Moses Spring to Rim Trail Loop

Overview

This is Pinnacles’ crowd-pleaser on the east side: a roughly 2.0-mile loop with about 440 feet of total gain that packs in volcanic spires, a talus cave, a serene reservoir, and rim-top views. Plan on about 1–1.5 hours depending on cave status and your pace. It’s popular for a reason—there’s a lot of variety for very little mileage—so expect company, especially on weekends and in spring.

Route Snapshot

Start from the Bear Gulch Day Use Area near the Bear Gulch Nature Center (East Entrance). Most hikers go up Moses Spring Trail through Bear Gulch, passing the seasonally accessible talus cave en route to Bear Gulch Reservoir, then return on the Rim Trail for airy views back down the gulch. If the cave is closed, a signed above-ground bypass keeps the loop intact and still delivers you to the reservoir.

What You’ll See

Pinnacles’ landscape was born from volcanic eruptions around 23 million years ago; the cliffs and toothy spires you’ll walk beneath are eroded remnants of that ancient field. The “caves” here aren’t carved by water—they’re talus caves formed where boulders tumbled into narrow canyons and wedged into place overhead, creating cool, dim passageways under stacked rock. The loop tops out at Bear Gulch Reservoir, a small, scenic impoundment that makes a perfect snack stop before you traverse the Rim Trail, where short, rocky stair-steps and ledges open up panoramic looks into the gulch.

Cave Status and Gear

Bear Gulch Cave opens and closes seasonally for bat protection and may also close after storms or high water. Bring a flashlight or headlamp if you intend to enter; sections can be very dark and occasionally wet or slick. Sturdy, grippy footwear is a must throughout—expect uneven rock and steps.

Best Time to Hike

Heat is the trip-wrecker here. Start early for cooler temps and softer light, especially late spring through early fall. Midday (roughly 10–4) can be brutally hot with limited shade. Weekdays and off-peak seasons are your best bet for thinner crowds and easier parking at Bear Gulch. Morning light is great in the gulch and on the reservoir; the rim gets nice, even light earlier in the day.

Know Before You Go

• No drinking water on the trail—carry your own. The park advises at least a liter per hour per person.
• Cell service is spotty; know your plan and limits. Let someone know your itinerary.
• Watch for poison oak, stinging nettle, and rattlesnakes; stay on trail and mind hand/foot placement.
• Pets aren’t allowed on park trails. Leave them at home for this one.
• There is no road across the park between west and east entrances; this loop is on the east side. Plan your approach accordingly.

Bottom line: If you want maximum variety for minimal effort, this loop is one of the best short hikes in the park. Even when the cave is closed, the reservoir and rim views keep it worthwhile.