Mertensia Falls
Colorado • Rocky Mountain National Park
By Armen Suny · Last verified May 2026
Photo Credits (1)
Difficulty
Moderate
Trail Length
3.0 miles
Trail Type
Out And Back
Elevation Gain
500 ft
About Mertensia Falls
Mertensia Falls tumbles through a quiet pocket of Rocky Mountain National Park, offering a peaceful reward for a short, moderate hike. Nestled within the park and managed by the National Park Service, the falls sit at the end of a 3.0-mile out-and-back route that climbs roughly 500 feet. The setting is classic Rocky Mountain National Park — forested slopes, occasional open viewpoints and the steady sound of water — making it a lovely half-day outing for hikers who want scenery without a long commitment. The trail to the falls is a pleasant, moderately paced hike suitable for those with some backcountry experience. Because this route is inside a national park, expect well-marked access and the interpretive feel of protected public land; bring layers and be prepared for changing mountain weather. Mertensia Falls is an inviting destination for photographers and families who can handle a bit of uphill and uneven footing to reach a scenic cascade tucked into the park’s forested terrain.
The Setting
Mertensia Falls sits at 10,400 feet within Rocky Mountain National Park, in the high alpine of Colorado.
Trail & Hike Details
The Approach
The moderate 3.0-mile out-and-back trail gains 500 feet of elevation on the way to the falls.
Trail Description
Trail type: out-and-back, total length 3.0 miles, elevation gain ~500 feet, difficulty: moderate. The route follows a natural tread through montane forest with occasional open views; surfaces include dirt, exposed roots and rocky sections. Expect moderate grades on the climb to the falls and some uneven footing — non-technical hiking that is best suited to those with basic trail experience. Managed by the National Park Service within Rocky Mountain National Park; trail signage and customary park regulations apply.
What to Expect
Visitors can expect a tranquil hike through nature, culminating in a beautiful waterfall surrounded by lush vegetation. The area may be less crowded compared to more popular destinations, offering a peaceful experience.
Accessibility
The trail is not wheelchair accessible. Uneven terrain and elevation changes require steady footing.
Frequently Asked Questions
🐶 Are Dogs Allowed at Mertensia Falls?
❌ Dogs are not allowed
Are There Any Fees or Permits Required?
🆖 No fees required
🏊 Is There Swimming at Mertensia Falls?
❌ Swimming is not allowed
When to Visit
Spring and early summer are ideal for visiting Mertensia Falls, as snowmelt typically enhances the waterfall's flow. Fall offers beautiful foliage, while summer provides warmer weather for hiking.
Seasonal Access
The best time to visit is Spring, Summer, and Fall. Access roads and trails may close during winter due to snow. Check with Rocky Mountain National Park for current conditions.
Safety Information
Be cautious of slippery rocks near the waterfall and stay on marked trails to avoid getting lost. Afternoon thunderstorms are common in Colorado, so plan your hike accordingly. Carry a first aid kit and inform someone of your plans before heading out.
Current Water Conditions
-106 ft³/s
Current discharge — how much water is flowing
Much lower than usual for this time of year
Based on 15 years of record
8.55 ft
Water depth at gauge
58°F
ColdBracing — limit time in water
What does this mean for your visit?
Flow is well below normal for this time of year, so the waterfall may be a trickle. Water temperature is a bracing 58 degrees F, limit your time in the water. Expect crystal clear visibility. PH is alkaline at 8.6 and mineral content is typical.
Water Quality
pH
AlkalineAbove normal range (6.5-8.5)
Water Clarity
Crystal clearExcellent visibility
Conductance
Dissolved minerals in the water
About This Gauge
This gauge is on a nearby waterway and may not reflect exact conditions at the falls.
Weather Forecast
Location & Access
Getting There
Mertensia Falls is located in a remote area of Colorado. Access typically requires driving to a trailhead, followed by a hike. Exact directions may vary depending on the starting point, so consulting a reliable map or GPS is recommended.
Get Directions on Google MapsParking
Parking is available at the trailhead, but spaces may be limited during peak seasons.
Elevation
10400 feet above sea level
Coordinates
40.212763° N, -105.641115° W
Land Management
Managed by NPS
Visitor Tips & Gear
Wear sturdy hiking shoes and bring plenty of water. Check weather conditions before your visit, as the trail may become muddy or slippery after rain. Start early to avoid afternoon thunderstorms, which are common in Colorado.
This trail sits at 10,400 ft — roughly 30% less oxygen than sea level
Extreme AltitudeAt this elevation, altitude sickness is a real concern. Monitor how you feel, take frequent rest breaks, and descend if symptoms worsen. Visitors arriving from lower elevations should allow time to acclimatize.
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Coppertone Sport SPF 50 Sunscreen
UV intensity jumps ~4% per 1,000 ft — at this elevation you can burn in half the time.
Sun Bum SPF 30 Lip Balm (3-Pack)
Lips have almost no natural UV protection and burn fast in thin, dry mountain air.
Liquid I.V. Electrolyte Packets
You lose moisture ~2x faster at elevation — electrolytes help you absorb water efficiently.
ROCKNIGHT Polarized UV400 Sunglasses
High-altitude glare off rock and water is intense — UV400 lenses block 99%+ of UVA/UVB.
Boost Oxygen 10L Canister (2-Pack)
Portable supplemental oxygen for quick relief from headaches and shortness of breath.
Altitude Rx OxyBoost Complex
Antioxidant formula designed to support your body's natural altitude acclimation.
Fingertip Pulse Oximeter
Monitor blood oxygen in real time — SpO2 commonly drops to 85–90% above 10,000 ft.
As an Amazon Associate, we earn from qualifying purchases.
With 3.0 miles and 500 ft of elevation gain, sturdy boots and trekking poles will help on this moderate trail. Sun exposure on the trail makes good sun protection a must in summer.
America the Beautiful Annual Pass
Covers entrance fees at 2,000+ federal recreation sites — required at most National Parks.
Polarized Sunglasses (Knockaround)
Cuts glare off the water so you actually see the falls — and your photos turn out better too.
Columbia Watertight II Rain Jacket
Packs into its own pocket, seam-sealed, and keeps you dry from spray and surprise rain.
Earth Pak Waterproof Dry Bag
Keeps your phone and gear dry when waterfall mist soaks everything else.
Waterproof Phone Pouch (AiRunTech)
Cheap insurance — take photos right next to the falls without killing your phone.
Timberland Euro Sprint Mid Waterproof
Trusted waterproof boot with premium leather and grippy rubber sole — reliable on rocky, wet trails.
TrailBuddy Trekking Poles
Lightweight aluminum, cork grips, and flip-locks that actually hold — a best-seller for good reason.
Where to Stay
Riversong Inn Retreat
Mountain Shadows Resort
Boulder Brook on Fall River
Murphy's River Lodge
Browse vacation cabins and private rentals nearby
Unique outdoor stays — tents, yurts, and treehouses
Rent a campervan or RV for your waterfall road trip
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Nearby Attractions
Nearby attractions may include other hiking trails and natural landmarks in the surrounding area.
Wildlife
The area is home to various wildlife, including birds, deer, and small mammals. Be cautious of potential encounters with bears or other larger animals.
Cities near Mertensia Falls
Nearby Waterfalls
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