The Big Lost

The Big Lost – Sun Valley, United States

• Date: September 8-11, 2027
• Location: Sun Valley, Idaho, United States
• Distances: 118 mi, 104 mi, 57 mi, 50 mi, 35 mi, 19 mi
• Event Type: Multi-day stage race and single-day gravel rides

The Big Lost is a multi-day gravel event in the backcountry of Sun Valley and Ketchum, Idaho. It includes an optional three-day stage race component as well as single-day ride options. Participants can choose to ride one, two, or all three stages.

Stage 1, "Harriman," is a 35-mile route with 2,599 feet of elevation gain, covering a mix of technical singletrack and doubletrack trails in the valley beneath the Boulder Mountains.

Stage 2, "Dollarhide," is a 50-mile ride from Ketchum and back that features a 4.5-mile timed hill climb segment up Dollarhide Summit. The route follows the Warm Springs Creek river basin on the approach.

The main event on Saturday offers four different route distances. The longest is the "Fully Loaded" at 118 miles (7,081 feet of climbing), which includes the original Copper Basin loop. The "Baked Potato" is 104 miles with 6,281 feet of climbing and goes over Corral Creek Summit. The "French Fry" option is a 57-mile route with 3,644 feet of elevation gain, including the Trail Creek Summit climb. The shortest option is the "Tater Tot," a 19-mile ride with 1,209 feet of climbing on a mix of pavement and gravel on Corral Creek Road.

The event also includes a vendor expo, a free shakeout ride, and awards ceremonies. A detailed schedule with packet pickup times, start times, and social events is available on the official event website.