Running the Numbers: A Day on Colorado’s Most Technical Rafting Run
A technical, full-day Arkansas River run that tests paddlers and rewards with big mountain views.
The first drop announces itself before you see it: a rumble, a spray-laced whisper that turns into a clap as water folds over rock. You feel the raft flex under you, the guide’s shout and the collective lean of paddles becoming the only language that matters. For six hours on the Arkansas River’s Numbers section near Buena Vista, Colorado, the river runs like an examiner — precise, relentless, exacting. It doesn’t accept half measures. If you come unprepared, it will correct you. If you come ready, it rewards you with a rowdy, unforgettable day under the Collegiate Peaks.
Trail Wisdom
Arrive Hydrated and Fed
Eat a hearty breakfast and drink water before launch; the exertion and cold water can sap energy quickly.
Use Secure, Closed-Cell Storage
Keep phones and keys in a watertight dry bag and attach it to the raft or your guideable locker.
Wear Proper River Footwear
Closed-toe, quick-draining shoes with a good sole protect toes and help you scramble in and out of boats.
Listen and Practice Rescue Drills
Pay attention to the safety briefing — learning a quick throwline or swim pattern can change an incident into a story.
Local Knowledge
Hidden Gems
- •Mount Princeton Hot Springs (soak after the run)
- •Cottonwood Lake Trail and scenic overlooks along Cottonwood Pass
Wildlife
Bald Eagles, Mule Deer
Conservation Note
Much of the corridor is managed by the Arkansas Headwaters Recreation Area; use licensed outfitters, pack out trash, and avoid disturbing riparian vegetation.
The Arkansas River corridor was historically used by Native peoples and later became a mining and transportation route during Colorado's 19th-century booms.
Seasonal Guide
spring
Best for: High flows and big waves, Longer rapids for experienced paddlers
Challenges: Colder water and variable weather, Higher, faster currents require more experience
Spring brings snowmelt-driven flows that amplify the Numbers’ technical features; go with experience or a strong guide and expect brisk temperatures.
summer
Best for: Warm air temperatures, Long daylight for full-day trips
Challenges: Higher visitor volume, Afternoon thunderstorms at elevation
Summer is the most popular season — warm shorelines and dependable operating schedules — but plan for weather swings and book early.
fall
Best for: Crisp air and autumn colors, Less crowded runs
Challenges: Lower flows can change run dynamics, Cooler water and early season shutdowns
Fall offers quieter runs and scenic foliage; flows drop so rapids feel different — check with outfitters for runability.
winter
Best for: Off-season planning and training, Soaking at hot springs post-raft in nearby towns
Challenges: Most commercial runs cease, Icy conditions and cold water risk
Commercial rafting on the Numbers largely pauses for winter; focus on training, scouting future trips, or enjoying nearby hot springs.
Photographer's Notes
What to Bring
Closed-Toe River ShoesEssential
Protect feet on rocky shorelines and provide traction in wet conditions.
Quick-Dry Layers (base + insulating mid-layer)Essential
Keeps you comfortable when splashed repeatedly and during cooler stretches.
Waterproof Dry BagEssential
Protects electronics and small valuables from immersion and spray.
High-SPF Waterproof Sunscreen & Sunglasses with RetainerEssential
Sun reflects off water and snowmelt; protect skin and eyes for the full day.
Common Questions
Do I need previous rafting experience?
No — experienced beginners who are physically fit can join guided Numbers runs, but the section is technical, so pay close attention to briefings and follow your guide’s instructions.
What is the minimum age to participate?
Minimum ages vary by outfitter; many require participants to be at least 12–14 years old for technical, full-day runs — confirm with your provider.
Are helmets and life jackets provided?
Yes, licensed outfitters typically supply helmets, personal flotation devices, and paddles as part of the trip package.
What happens if the river flow is too high or low?
Outfitters monitor flows daily and will reschedule or reroute trips if safety is compromised; cancellation policies vary, so check when booking.
How wet will I get?
Expect to get wet — waves, sprays, and possible swims are part of the experience; dress accordingly with quick-dry clothing and secure storage for gear.
Is tipping expected for guides?
Tipping is customary for river guides and appreciated; 15–20% of the trip cost is a typical guideline based on service and difficulty.
What to Pack
Quick-dry layers and a light insulating mid-layer for changing temperatures; closed-toe river shoes for grip and protection; waterproof dry bag for phone and keys; high-SPF waterproof sunscreen and sunglasses to manage reflected glare.
Did You Know
The Arkansas River flows from the Rocky Mountains through Buena Vista and is one of the most rafted rivers in Colorado; the Arkansas Headwaters Recreation Area was created to balance public recreation with river conservation.
Quick Travel Tips
Book trips early in summer; arrive the night before to avoid day-of stress; carry a printed confirmation and emergency contact; check river flow reports with your outfitter before departure.
Local Flavor
After the run, head to Eddyline Brewery or Buena Vista Brewery for a cold beer and local fare; for a quieter meal, try a riverside cafe, then soak aching muscles at Mount Princeton Hot Springs to cap the day.
Logistics Snapshot
Closest airports: Colorado Springs (COS, ~2.5 hours) or Denver (DEN, ~3.5 hours); typical driving from Buena Vista town center to launch: 10–20 minutes; cell service: patchy in canyon sections; permits: commercial outfitters handle required access and permits via the Arkansas Headwaters Recreation Area.
Sustainability Note
This river corridor is managed for recreation and conservation—use outfitters that follow AHRA guidelines, pack out waste, avoid trampling riparian zones, and minimize single-use plastics.