River CO

East Fork Cimarron River

Colorado • 38.1393, -107.4867

Reviewed mapped path Updated Dec 30, 2025

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USGS and NOAA data is for informational purposes. Source notes

Length

13 mi

20 km

Elevation

12,417′ → 9,010′

3,407 ft drop

Stream Order

Medium River

Slope

5.14%

271.5 ft/mi

Drainage

22 mi²

57 km²

Avg Flow

-- cfs

1.1 mph velocity

Path to Mouth

2,279 mi

3,668 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