River CO

Duffy Tunnel

Colorado • 40.4305, -107.8638

Reviewed mapped path Updated Dec 30, 2025

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USGS and NOAA data is for informational purposes. Source notes

Length

0 mi

1 km

Elevation

6,211′ → 6,036′

175 ft drop

Stream Order

Major River

Slope

9.72%

515.8 ft/mi

Drainage

2,756 mi²

7,138 km²

Avg Flow

-- cfs

2.8 mph velocity

Path to Mouth

2,417 mi

3,889 km to ocean

Classification

Tributary

Mid-reach

Elevation Profile

Water Quality

Data from EPA Water Quality Portal (USGS, EPA, state agencies).

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Data from USGS & NOAA for informational purposes only. Read source and safety notes

Rain Radar