Valles Caldera (or Jemez Caldera), is a 12 mi (19 km) wide volcanic caldera in the Jemez Mountains of northern New Mexico. Within its caldera, Valle Grande (local pronunciation: /ˈvaɪ.eɪ ˈɡrɑːndeɪ/; vy-ay grahn-day) is the largest valle (grass valley) and the only one with a paved road.
A number of recreational and/or historical uses take place in the Valles Caldera. Many of these uses involve trails. Valles Caldera has many miles of ranch roads and livestock and game trails. These include a network of trails currently designated for horse riding. Historically, Valles Caldera was a location for equestrian endurance races. After establishment of VCNP the first race in the caldera was held in 2009. The largest grass valley, Valle Grande, is a venue for ski orienteering. Activities are open to the public, though some require reservations. Customer service and concierge services are provided by the Public Lands Interpretive Association.