Discover the dog-friendly Pacific Electric Inland Empire Trail, a 21-mile route following the historic path of the Pacific Electric Railway through the western San Bernardino Valley. When fully completed, it will stretch from Rialto to Claremont, offering an east-west pathway that’s perfect for a long walk or multiple outings with your dog.

Start at the trailhead on Route 66 (Foothill Boulevard) near Baker in Rancho Cucamonga, where you’ll find a spacious 10-foot-wide concrete path designed for both pedestrians and cyclists. The main path is smooth and easy to navigate with your dog, and a companion decomposed granite side path provides an alternative surface if your dog prefers something softer underfoot. The Upland segment switches to asphalt and features pleasant landscaping that makes the walk feel less industrial.

As you head east, the trail takes you through a mix of residential neighborhoods and commercial areas, giving you a real sense of how the region developed along these historic rail lines. One of the highlights is seeing one of the last remaining railway depots from the San Bernardino line in Rancho Cucamonga on Etiwanda Avenue—it’s a tangible connection to the area’s past and a good landmark if you’re orienting yourself along the route.

The trail’s width and relatively flat terrain make it manageable for dogs of different ages and sizes, though you’ll want to bring water since shade can be sparse in some sections. The route connects through multiple communities, so you can access different starting points depending on how long you want your outing to be. The trail is still under development in places, but the completed sections are well-maintained. Dogs need to be leashed, and it’s worth checking current conditions before you go since some segments may be under construction.