River CO

Twomile Arroyo

Colorado • 37.8120, -104.1521

Hydrography profile Updated Dec 30, 2025

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USGS and NOAA data is for informational purposes. Source notes

Length

6 mi

10 km

Elevation

5,256′ → 4,711′

545 ft drop

Stream Order

Stream

Slope

1.66%

87.5 ft/mi

Drainage

650 mi²

1,682 km²

Avg Flow

-- cfs

0.7 mph velocity

Path to Mouth

1,198 mi

1,928 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