San Gabriel Mountains National Monument covers 342,177 acres of the Angeles National Forest and 4,002 acres of neighboring San Bernardino National Forest, rising dramatically just 90 minutes from the Los Angeles Basin. These mountains do far more than provide a scenic backdrop to the city—they’re working lands that supply Angelenos with 70 percent of their available open space and generate 30 percent of the region’s drinking water.

With your dog on leash, you’ll find plenty to explore here. The trail options are extensive, ranging from easier walks to serious elevation gains, and many pass through oak woodlands, chaparral, and pine forests depending on which section you’re visiting. Hiking is the main draw, but the monument also supports bicycling, horseback riding, and fishing if you’re looking to mix up your activities. In winter, some higher elevations offer skiing opportunities, and if you’re into off-highway vehicle use, designated areas accommodate that too.

The geological and natural history storytelling throughout the monument adds real depth to a visit. You’ll see evidence of past volcanic activity, different plant communities at various elevations, and cultural sites reflecting the area’s human history. Picnicking is easy to arrange, with developed areas scattered across the monument, and if you’re planning a longer stay, campgrounds welcome leashed dogs as well.

Your dog can accompany you on trails and in most developed areas, plus wilderness sections are open to leashed dogs. Just know that buildings are off-limits for dogs, as are swimming areas. Some cabins don’t allow dogs either, so if you’re renting accommodations, confirm the pet policy when you book. The sheer scale of this monument means you could spend a weekend here and barely scratch the surface, with new canyons and ridgelines to discover on each visit.