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Arkansas River · Colorado

Arkansas River Levels

Flows on the Arkansas change daily through the season, and the reading drives everything from wave size to which sections are running to whether age minimums tighten on the advanced trips. Below you’ll find live USGS data from the Granite, Nathrop, and Parkdale gauges, the Upper Arkansas snowpack feeding them, and a plain read on what each range means in the boat.

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See Today's River Conditions
― Arkansas River Conditions

Live flow on the Arkansas.

Every River Runners guide checks the gauge before the first launch of the day. So can you — pick a stretch and read the water in real time, straight from the USGS.

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Loading live data…

Discharge — Last 7 Days

Daily flow Median
As of — Source: USGS

What CFS Means for Your Trip

Cubic feet per second is the volume of water moving past the gauge each second — it controls wave size, rapid intensity, age minimums, and how much swimming happens. Arkansas River flows fall into three ranges.

LowUNDER 650 CFS

Rocks are more exposed, so guides work harder on line selection. Best for families and first-timers. Try a ducky or the Royal Gorge for high adventure.

Moderate650 – 2,000 CFS

The textbook Arkansas River trip — the sweet spot is roughly 700–1,900 cfs. Rapids feel real but read clean. Every commercial section runs.

HighOVER 2,000 CFS

Bigger waves, faster water, more swim risk. Age minimums tighten and difficulty notches up. Experienced paddlers love it.

  • ― Arkansas River Conditions

Live flow at Nathrop.

Every River Runners guide checks the Nathrop gauge before the first launch of the day. So can you.

  • Moderate Flow
1,450 cfs

The textbook Arkansas trip. Rapids are big enough to feel real but read clean — every commercial section is running.

The Arkansas at Nathrop is running at a moderate flow level today. Use the seven-day trend and the long-term median to see whether the river is running above, below, or right at typical for the date.

  • ― Where the Water Comes From

Snowpack in the Upper Arkansas headwaters.

The river you raft in July is the snow that fell in January. We track the basin’s snow water equivalent all winter — it’s the best forecast of the season ahead.

  • Above Median
105 % of median

A healthy snowpack is sitting in the high country. Expect a full, reliable season with strong flows well into summer.

Snow water equivalent (SWE) is how much water the snowpack would release if it melted all at once. A bigger peak — usually late April — means more runoff, bigger early-summer water, and a longer rafting season.

  • Above Median
105 % of median

A healthy snowpack is sitting in the high country. Expect a full, reliable season with strong flows well into summer.

Snow water equivalent (SWE) is how much water the snowpack would release if it melted all at once. A bigger peak — usually late April — means more runoff, bigger early-summer water, and a longer rafting season.

What CFS Means for Your Trip

CFS stands for cubic feet per second — the volume of water moving past the Nathrop gauge each second. The reading tells you how much water you’re paddling, which controls almost everything about the trip: wave size, rapid intensity, age minimums, and how much swimming happens. On the Arkansas, flows generally fall into three ranges.

Low

Under 650 cfs

A scenic, technical trip. Rapids look smaller, but the rocks are closer to the surface, so guides work harder on line selection. Better for families and first-timers.

Moderate

650 – 2,000 cfs

The textbook Arkansas trip — the sweet spot is roughly 1,200 to 1,800 cfs. Rapids are big enough to feel real but read clean. Every commercial section runs.

High

Over 2,000 cfs

Bigger waves, faster water, more swim risk. Age minimums tighten and the difficulty notches up. Experienced paddlers love it; we move some guests off advanced trips.

How to Read the Chart

Find the gauge

The chart pulls from USGS gauge 07091200, the Arkansas River near Granite (Numbers), Nathrop (Browns Canyon), and Parkdale (Bighorn Sheep Canyon and the Royal Gorge).

Read the Y-axis

It shows discharge in cubic feet per second; the X-axis shows the last seven days.

Compare to the median

The dashed line is the long-term median for the date, so you can see whether today runs above, below, or right at typical.

Pick your trip

Match the reading to the three ranges above to choose the section that fits your group.

Why We Watch

The Granite Gauge is the primary gauge we monitor for The Numbers. The Nathrop Gauge provides flow data for Browns Canyon National Monument, while the Parkdale Gauge shows current river conditions in Bighorn Sheep Canyon and Royal Gorge.

Big spikes after a warm June day usually indicate accelerated snowmelt. Sudden drops in late summer often occur when an upstream irrigation gate is opened. Spikes in July are typically caused by strong monsoon rains.

We pull the gauge every morning before the first launch and brief guides on what to expect that day.

Not sure whether today's flow suits your group? We read this chart every morning — give us a call.

Talk to a Guide
(719) 395-2466

THANK YOU FOR A GREAT SEASON!

We're closed for the 2026 season! Check back later this winter or call us at 719-395-2466 to book your 2027 adventure.
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