The Big Lost 2027.
Gravel · Ketchum / Sun Valley, Idaho · USA
8 Sept 2027
Rebecca's Private Idaho, continuing under the name The Big Lost, sends riders from Champions Meadow in Sun Valley over Trail Creek Summit into the high desert basins of the Lost River and Copper Basin country, with washboard, headwinds and a long sustained climb over Corral Creek Summit on the two longest options. An optional three-day Queen's Stage Race adds the singletrack-heavy Harriman Trail beneath the Boulder Mountains and a timed hill climb to Dollarhide Summit before Saturday's main event. Support is deliberately sparse, roads are open to traffic and cell coverage is patchy, so riders are expected to be self-sufficient between rest stops.
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Frequently asked questions
When is The Big Lost 2027?
The Big Lost takes place on 8 Sept 2027 in Ketchum / Sun Valley, Idaho. Check the organiser's site for the final word.
What routes does The Big Lost offer?
The options are Fully Loaded Potato (longest route, includes Copper Basin loop) (190 km / 118 mi, 2160 m / 7087 ft climbing), Baked Potato (signature route over Corral Creek Summit) (167 km / 104 mi, 1910 m / 6266 ft climbing), French Fry (mid-distance with the Trail Creek climb) (92 km / 57 mi, 1110 m / 3642 ft climbing), Tater Tot (entry-level route on Corral Creek Road) (31 km / 19 mi, 370 m / 1214 ft climbing), Stage 1 Harriman (Queen's Stage Race, Baker Creek start, Wednesday) (56 km / 35 mi, 790 m / 2592 ft climbing) and Stage 2 Dollarhide (50 miles from Ketchum with a 4.5-mile timed hill climb, Thursday) (80 km / 50 mi, 900 m / 2953 ft climbing), as published by the organiser.
How do I enter The Big Lost?
Entries are handled by the organiser via formstack. The button above takes you to the official page.
Dates, routes and conditions from the linked organiser sources; the official page always has the final word. Not affiliated with the organiser. Every entry is source-checked — nothing here is AI-generated or estimated.