Runyon Canyon Park, Nature reserve in Hollywood Hills, Los Angeles, US

Runyon Canyon Park is a 160-acre (65 ha) nature reserve at the eastern end of the Santa Monica Mountains in Los Angeles. A fire road, Runyon Canyon Road, runs roughly north-south through the center between the Fuller Avenue and Mulholland Drive entrances, with numerous smaller hiking trails branching off. The highest point is Indian Rock at 1,320 ft (402 m). The park is part of the Santa Monica Mountains National Recreation Area.

A Greek immigrant named Caralambo received this land through a federal grant in 1867 after serving in a US Army camel unit. Ownership changed hands several times over the following decades until the city acquired the property in the late 1980s and opened it to the public as parkland.

The canyon's name comes from Carman Runyon, a retired coal businessman who bought the land in 1919 with his second wife Ellen Hunt and used it for riding and hunting. The couple built a small bungalow near the Fuller Avenue entrance. The estate later passed to the Irish tenor John McCormack, who called his mansion "San Patrizio"; remains of terraced gardens and buildings can still be seen below the Vista gates.

Access points along Fuller Avenue at the southern end and Mulholland Drive at the northern boundary let visitors choose routes of different lengths and difficulty. Early mornings and late afternoons offer cooler temperatures, while the open nature of the trails ensures good visibility in most weather conditions.

Around 90 acres (36 hectares) within the reserve allow dogs to roam without leashes, making this a magnet for pet owners across the city. This policy draws many visitors specifically for their four-legged companions, and the upper sections often host more dogs than people during peak hours.