Walnut Park’s dog area sits along Mulholland Highway with ridgeline views that stretch across open terrain. The park spans several acres with enough space for dogs to run without constantly crossing paths. Grass dominates the landscape with shaded spots under established trees, creating variation depending on where you settle. The terrain is relatively flat, making navigation easy for dogs of any age. A small parking lot serves the area, and off-peak times typically offer plenty of space, though the lot fills quickly during early morning and late afternoon weekend hours. The nearest significant cross-street is Topanga Canyon Boulevard, about a mile south.

The park maintains a fully fenced main area for larger dogs and a separate enclosed section for small dogs. Fencing is solid and well-maintained, with staff periodically checking the space. Dogs are allowed from dawn to dusk, aligning with typical county park hours. A water station is available for dogs, though bringing your own water and bowl is wise on warm days, as the single station can get busy.

The grass can become dry and compacted by mid-afternoon in summer, especially in the main enclosure where most dogs congregate. Arriving earlier in the day means better ground conditions and a calmer environment for dogs still learning to socialize in off-leash spaces. Mulholland Highway runs directly past the entrance, so plan accordingly when arriving with your dog. Peak usage times tend to be early morning and late afternoon on weekends, when the parking area is most crowded.