Tucked into the Arkansas Headwaters, the Numbers serve up a relentless, technical half-day of Class IV rapids. This full-day guided run pairs tight whitewater with local geology and a riverside lunch — for experienced paddlers and fit first-timers ready to follow swift commands.
More ways to explore the area's outdoor wonders
You push off from the bank and the Arkansas River immediately demands attention — current tightening, water churning around granite teeth. The Numbers section is compact and technical: ledges, wave trains and braided channels that force quick reads and precise strokes. Guides set a brisk pace; spray and shouts become the rhythm as boats thread through Class IV sequences.
Difficulty
challenging
Duration
6 hours
Fitness Level
Strong cardiovascular fitness and upper-body endurance recommended; able to perform repeated paddling bursts and recover quickly.
Wildlife
History
The Arkansas Headwaters supported 19th-century mining and transport; modern protections and flow management transformed it into one of Colorado’s premier whitewater corridors.
Conservation
Flows are managed for recreation and ecosystem health; practice Leave No Trace, avoid trampling native riparian vegetation, and follow guide instructions to minimize disturbance.
Reserve your spot on the 1-Day Arkansas River - The Numbers Rafting Trip today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Be ready to swim
Wear a snug PFD and practice floating on your back; swims in the Numbers are cold and the current moves fast.
Footwear that stays on
Use secure water shoes or neoprene booties — loose sandals will be lost during aggressive maneuvers.
Protect from sun and spray
Wear SPF-rated lip balm, sunglasses with a retainer, and a quick-dry sun shirt; spray can chill you even on warm days.
Tell guides health details
Disclose recent injuries, heart conditions, or pregnancy—operators reserve the right to refuse service for safety.
Secure water shoes or neoprene booties
Keeps feet protected and prevents loss during active maneuvers.
summer
Quick-dry layers (synthetic or neoprene)
Traps less water and helps regulate temperature when spray and wind chill are factors.
spring
Sunglasses with retainer + waterproof sunscreen
Protects eyes and skin from persistent alpine sun reflected off the water.
summer
Small dry bag or waterproof container
Keeps phone, warm layers, and medication dry during the run.