Hazard Warning: Hazard information may be user-submitted and unverified. Conditions change frequently. Always scout rapids and obstacles yourself.
Hazard CO Class IV+

Sieve City/Closet

Gunnison - 03. Crystal Dam to Chukar Trail (CO)

Gauge Conditions
Runnable: 600.0 – 3,000.0 CFS
Photo
Sieve City/Closet
Photo courtesy of American Whitewater
Description
Sieve City is a highly technical Class IV+ rapid with multiple rocky constrictions and dangerous undercut features that demand precise boat placement. Paddlers must navigate a complex series of sharp-edged rocks and potential pin spots, with a critical line that requires immediate decision-making and expert boat control to avoid potentially fatal entrapment zones. The rapid's most significant hazard is a network of potential sieves and tight channels that can quickly trap or flip boats, making scouting and a conservative approach essential.
Location
Type
Hazard
Difficulty
Class IV+
Mile Marker
15.0 mi
Directions
View Full Run
03. Crystal Dam to Chukar Trail
Gunnison
IV-V(V+) 14.4 mi
Hazard — Exercise extreme caution in this area.
Current Conditions
5-Day Forecast
Whitewater data from
American Whitewater