Boulder Reservoir loop via 63rd Street, Niwot Road, and 36 from Pearl Street
Boulder Reservoir loop via 63rd Street, Niwot Road, and 36 from Pearl Street
4.6
(1880)
17,305
riders
Boulder Reservoir loop via 63rd Street, Niwot Road, and 36 from Pearl Street
01:26
33.7km
190m
Road cycling
The Boulder Reservoir loop via 63rd Street, Niwot Road, and 36 from Pearl Street offers a classic road cycling experience, blending urban energy with expansive rural views. You'll pedal past the scenic Boulder Reservoir, often with paddleboarders and sailors, all set against the stunning backdrop of the Flatirons and Rocky Mountains. The route then takes you through quiet agricultural lands on 63rd Street and Niwot Road, providing a sense of peaceful, open-road cycling.
This easy 21.0-mile (33.7 km) ride, with a gentle 615 feet (187 metres) of elevation gain, typically takes about 1 hour and 25 minutes to complete. Starting from Pearl Street, it's a popular choice for both casual outings and training rides. While the terrain is mostly flat to gently rolling, be aware that strong headwinds can significantly increase the effort required, so check the forecast before you go.
This loop is one of Boulder's most iconic and popular road cycling routes, frequented by a mix of professional and amateur cyclists. Its relatively flat and consistent nature makes it a staple for training rides and group outings, serving as an excellent gateway to other cycling options in the area. The diverse scenery, from the vibrant Pearl Street to the open plains and mountain vistas, provides a well-rounded cycling tour of the Boulder area.
Last updated: June 9, 2026
Tips
Your route passes through protected areas
Please check local regulations for:
Waypoints
Start point
Parking
9.78 km
Foothills Views
Highlight • Viewpoint
Tip by
19.0 km
View of Haystack Mountain and Farms
Highlight • Viewpoint
Tip by
22.5 km
Highway 36 (North Boulder to Neva)
Highlight (Segment) • Cycleway
Tip by
32.9 km
East Pearl Street
Highlight (Segment) • Settlement
Tip by
33.7 km
End point
Parking
Way Types & Surfaces
Way Types
21.5 km
10.0 km
2.00 km
261 m
Surfaces
29.8 km
3.82 km
149 m
< 100 m
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Sign up for freeElevation
Highest point (1,700 m)
Lowest point (1,570 m)
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Sign up for freeWeather
Powered by Foreca
Today
Saturday 24 October
15°C
5°C
30 %
Additional weather tips
Max wind speed: 8.0 km/h
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This route was planned by komoot.
Frequently Asked Questions
How long does it typically take to complete the Boulder Reservoir loop via 63rd Street, Niwot Road, and 36 from Pearl Street?
Based on komoot data, this 33.7 km (20.9 miles) racebike route typically takes around 1 hour and 25 minutes to complete. This can vary depending on your pace and how often you stop to enjoy the views.
What is the terrain like on this Boulder Reservoir cycling route?
The route is primarily on well-paved surfaces, making for a smooth ride suitable for road bikes. You'll encounter gently rolling hills, particularly on N 63rd Street, which also features a generous shoulder for cyclists.
Is this cycling loop suitable for beginners or less experienced riders?
Yes, this route is rated as 'easy' for road cycling. Its mostly paved surfaces and relatively low elevation gain (around 187 meters or 623 feet) make it suitable for cyclists of varying fitness levels, including beginners.
What scenic views and landmarks can I expect along the route?
You'll enjoy picturesque views of the Boulder Reservoir, the Flatirons, and the Front Range peaks. The route also passes through rural landscapes with views of Haystack Mountain and Farms. Sections like Highway 36 (North Boulder to Neva) and East Pearl Street offer distinct local character.
Where can I park to access this cycling loop, especially if starting from Pearl Street?
Starting from Pearl Street in Boulder offers easy access. You can find various public parking garages and street parking options around the Pearl Street Mall area. Be sure to check local parking regulations and fees.
What is the best time of year to cycle this Boulder Reservoir loop?
The Boulder area generally offers excellent cycling conditions from spring through fall. Spring brings blooming landscapes, while fall provides comfortable temperatures and beautiful foliage. Summer is also popular, but be mindful of midday heat. Always check the weather forecast before you go.
Are dogs allowed on the cycling paths that make up this route?
While the route primarily uses public roads and designated cycle ways, specific regulations for dogs can vary. The Boulder Reservoir itself has restrictions, and trails within Boulder Open Space and Mountain Parks often require dogs to be on a leash. It's best to check specific trail sections if you plan to bring a dog.
Do I need any special permits or pay entrance fees for this cycling route?
No, you do not need a special permit or to pay an entrance fee to cycle this specific route. It primarily uses public roads and cycle paths. However, if you plan to access facilities or specific areas around the Boulder Reservoir, separate fees or permits might apply for those activities.
Does this route intersect with other notable cycling trails in the Boulder area?
Yes, the route briefly intersects with several other paths. You'll find sections that overlap with the Longmont-to-Boulder (LOBO) Regional Trail, Left Hand Trail, Goose Creek Greenway, and the Wonderland Creek Greenway, among others.
Are there any cafes or places to get refreshments near the route, especially around Pearl Street?
Yes, starting from East Pearl Street puts you in the heart of Boulder's vibrant downtown, which is full of cafes, restaurants, and shops. You'll find numerous options for coffee, snacks, or a meal before or after your ride.
Is this Boulder Reservoir loop considered a popular route, and will I encounter other cyclists?
Yes, sections of this route, particularly N 63rd Street and Highway 36, are very popular with local cyclists and are considered 'classic Boulder loops.' You will likely encounter many other riders, especially on weekends and during good weather.
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