The NextGen San Juans: Durango and Silverton is a June bicycle tour based in Durango and Silverton, Colorado, featuring a train ride. It is part of the NextGen San Juans series, organized by the HeartCycle Bicycle Touring Club. The club uses the event to welcome newer cyclists while remaining open to all participants.
Riders spend two days cycling near Durango before traveling to Silverton on the third day. The fourth morning involves climbing Red Mountain Pass, a significant ascent in the San Juan Mountains. The Durango & Silverton Narrow Gauge Railway then transports riders back to Durango, included in the tour fee. The San Juan Mountains provide the setting, described by the organizer as Colorado's most scenic riding region. The event is structured as a guided mountain tour rather than a conventional race.