This is a high desert trail that takes you from the cooler Pinyon Flat area down into real desert country. The hike starts at 4,000 feet near Highway 74, directly across from Pinyon Flats Campground. You’ll find the parking area on the road heading south—it’s shared with the Sawmill Trail and sits just before the Riverside County Transfer Station. Look for the trailhead sign at the east end of the lot, and grab your Wilderness permit at the sign-in box a short way in.

The first stretch is manageable. You descend 2.5 miles to Horsethief Creek, then another 2 miles to Cactus Spring itself. The trail is pretty straightforward through here, making it doable for most hikers and easier for dogs who aren’t scrambling over technical terrain. Once you reach the spring, you’ve covered solid mileage, and many people call it a day here—which is smart because the trail gets serious after this point.

If you want to push on, the path continues another 15 miles toward Martinez Canyon and Highway 86 down in the low desert, but fair warning: it becomes very difficult to follow. This section requires real navigation skills and isn’t the place to wander if you’re uncertain. Much of the entire route winds through the Santa Rosa and San Jacinto Mountains National Monument Wilderness area, so you’re surrounded by actual protected landscape rather than just scenic views.

The high desert start means cooler temperatures early on, which is helpful for dogs. Bring plenty of water since Cactus Spring is your main water source, and the desert section beyond it is dry. This is a good choice if you want a solid half-day hike with manageable distance and fewer crowds than some of the more popular local trails.