4.5
(4803)
5,682
runners
02:47
21.2km
470m
Running
Jog the difficult 13.2-mile Grand Ditch and Lulu City Loop in Rocky Mountain National Park, featuring historical ruins and wildlife.
Last updated: February 26, 2026
Tips
Your route passes through a protected area
Please check local regulations for:
Waypoints
Start point
Parking
Get Directions
93 m
Highlight (Segment) • Trail
Tip by
15.3 km
Highlight • Historical Site
Tip by
21.2 km
End point
Parking
Way Types & Surfaces
Way Types
14.2 km
6.84 km
115 m
< 100 m
Surfaces
6.91 km
6.84 km
4.36 km
2.97 km
115 m
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Elevation
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Weather
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Today
Monday 13 July
24°C
6°C
14 %
Additional weather tips
Max wind speed: 15.0 km/h
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This route was planned by komoot.
The Grand Ditch and Lulu City Loop is typically accessed from trailheads within Rocky Mountain National Park. Specific parking information for the Colorado River Trailhead, which is a common starting point for this loop, can be found on the park's official website or by checking local visitor resources like visitnorthparkco.com.
Yes, as this trail is located within Rocky Mountain National Park, you will need to pay the park's entrance fee. Depending on the time of year and specific entry points, a timed entry permit may also be required. It's best to check the official Rocky Mountain National Park website for the most current information on fees and permit requirements before your visit.
No, dogs are generally not permitted on trails within Rocky Mountain National Park, including the Grand Ditch and Lulu City Loop. This regulation helps protect wildlife and natural resources. Service animals are an exception to this rule.
The best time to jog this loop is typically from late spring through early fall (roughly June to September). During these months, the snow has usually melted, and the weather is more favorable. Fall offers beautiful aspen colors, while summer provides lush meadows. Always check current trail conditions before heading out, especially in shoulder seasons.
The terrain is varied. The initial section along the Colorado River is generally wide and flat, passing through forests and meadows. However, the loop involves a significant elevation gain of about 1,200 feet, which is gradual but consistent on the way to the Grand Ditch. The Grand Ditch itself is a level, maintained dirt road. After leaving Ditch Camp, the trail descends at a fairly steep grade on an old stagecoach road. Expect a mix of wide paths, dirt roads, and some steeper sections, making it a challenging jog.
This loop is approximately 13.6 miles (21.2 km) long. For an average jogger, it can take around 2 hours and 47 minutes (10046 seconds) to complete, depending on your pace, fitness level, and how often you stop to enjoy the scenery or explore historical sites.
This route is rich in history and natural beauty. You'll jog along the Colorado River Trail, passing through forests and meadows with views of the Colorado River valley and the Never Summer Mountains. A major highlight is the Lulu City Ruins, a ghost town from the late 1800s where you can see foundations, log cabins, and mine remains. You'll also encounter the Grand Ditch, an impressive historic engineering marvel.
The meadows and riparian areas along the trail are prime habitats for wildlife. Joggers frequently spot deer, elk, and moose. Keep an eye out for smaller mammals and various bird species as well. Remember to maintain a safe distance and never feed wildlife.
Yes, the route incorporates sections of several other trails. You'll spend a significant portion on the Grand Ditch Trail and the Colorado River Trail. Other paths like the Red Mountain Trail, Thunder Pass Trail, and Timber Lake Trail also intersect or run concurrently with parts of the loop.
Given the length and varied terrain, it's essential to be prepared. Bring plenty of water, snacks, appropriate layers of clothing for changing mountain weather, sun protection (hat, sunscreen), and a map or GPS device. Bear spray is also recommended in this area. Sturdy jogging shoes with good traction are a must.
Considering the 'difficult' rating and significant elevation changes, a strategic approach can enhance your experience. The elevation gain is described as gradual but consistent on the way to the Grand Ditch, so pacing yourself early is key. The descent from Ditch Camp towards Lulu City has a 'fairly steep grade,' which can be hard on the knees, so consider a slower pace or even walking these sections. Breaking the loop into segments in your mind can also help manage the distance and varied terrain.
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