Hidden Canyon Park in Carlsbad occupies a 22-acre site at 2685 Vancouver Street, formerly known as Larwin Park, where more than two-thirds of the acreage remains undeveloped to protect habitat for the endangered California gnatcatcher. The developed portion features two separate playgrounds with rubberized surfaces for ages two through five and five through twelve, a contrast to the active sports orientation found at larger Carlsbad parks, and the same family-oriented walkability that puts it within a short drive of Carlsbad Village dining anchors such as Harbor Fish Cafe. Paved walking paths loop through the grassy open space between the play areas, offering flat terrain for strollers, scooters, and small bicycles away from street traffic. A quarter-mile connector trail descends from the park's southern edge to the Ann D. L'Heureux Dog Park on Carlsbad Village Drive, threading through the canyon's native vegetation and linking two of the city's most-used passive recreation spaces. The large central canyon that bisects the property supports southern willow scrub and coastal sage scrub plant communities monitored under the city's Habitat Management Plan, preserving an 18-acre wildlife corridor within an otherwise residential grid.