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San Diego County

Kelly Ditch Trail

Moderate

4.8

(1104)

11,815

hikers

Kelly Ditch Trail

02:54

9.40km

400m

Hiking

Embark on the Kelly Ditch Trail for a moderate hiking experience that spans 5.8 miles (9.4 km) and climbs 1312 feet (400 metres). You can expect to complete this route in about 2 hours and 54 minutes, immersing yourself in a landscape of ecological recovery. As you hike, you will see the striking contrast of bleached white oak and conifer skeletons against vibrant new growth of chaparral, pines, and ferns. The trail offers scenic beauty, especially within the William Heise County Park section, where you can enjoy views of North Peak and other distant mountains.

Before you head out, note that dogs are generally not permitted on the Kelly Ditch Trail, so plan accordingly if you usually hike with a canine companion. The route welcomes hikers, equestrians, and mountain bikers, offering a shared path for various outdoor enthusiasts. If you are a mountain biker, be aware that some sections might present challenges due to overgrown areas or fallen trees. You can often find a sense of solitude on the more remote parts of the trail, making it ideal for a peaceful escape.

The Kelly Ditch Trail provides a unique opportunity to witness nature's resilience firsthand, showcasing the ecological recovery from the 2003 Cedar Fire. This trail connects William Heise County Park and Cuyamaca Rancho State Park, giving you options for different lengths of hikes depending on your preference. The William Heise County Park portion is particularly known for its scenic beauty and diverse wildflowers, adding to the trail's appeal. It is a notable route in the region for its blend of natural history and outdoor recreation.

Last updated: April 23, 2026

Tips

Your route passes through a protected area

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Waypoints

A

Wildflowers of William Heise County Park

Highlight • Natural

The road into William Heise County Park winds through oak woodlands with a steady elevation gain. Once inside, you’ll find shaded picnic spots, restrooms, and a cool forest setting—a big change from the exposed roads around Julian. The park is part of the Cleveland National Forest, and during the right season, you’ll see a variety of wildflowers that are part of the local ecosystem.

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9.40 km

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Way Types & Surfaces

Way Types

6.41 km

2.29 km

698 m

Surfaces

8.82 km

486 m

< 100 m

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Elevation

Elevation
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Highest point (1,580 m)

Lowest point (1,230 m)

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Weather

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Today

Saturday 10 October

25°C

14°C

71 %

Additional weather tips

Max wind speed: 12.0 km/h

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Frequently Asked Questions

Where can I park to access the Kelly Ditch Trail?

You can access the trail from both William Heise County Park and Cuyamaca Rancho State Park. For William Heise County Park, parking is available within the park itself. If starting from Highway 79, there are likely designated parking areas near the trailhead entrance.

Are there any permits or fees required to hike this trail?

Yes, since a significant portion of the trail passes through William Heise County Park, there may be entrance fees or day-use fees required by the park. It's advisable to check their official website or contact the park directly for current fee information before your visit. Cuyamaca Rancho State Park may also have fees depending on your access point.

Is the Kelly Ditch Trail dog-friendly?

Generally, dogs are not permitted on the Kelly Ditch Trail, especially within Cuyamaca Rancho State Park. Regulations can vary between park sections, so it's best to confirm with both William Heise County Park and Cuyamaca Rancho State Park regarding their specific pet policies before bringing your dog.

When is the best time of year to hike this trail?

The trail offers unique experiences throughout the year. Spring is excellent for viewing wildflowers, particularly in the William Heise County Park section. Fall provides pleasant temperatures and changing foliage. Summer can be hot, so an early start is recommended, while winter can bring cooler weather. Always check current conditions before heading out.

What kind of terrain can I expect on the route?

The trail is primarily a singletrack. You'll encounter relatively flat sections, especially through the oak forest, but also rockier parts with switchbacks. Some areas may be overgrown or have fallen trees, giving it a wild character. Be aware that poison oak has been reported in certain sections.

What natural features or viewpoints will I see along the way?

You'll witness the remarkable ecological recovery from the 2003 Cedar Fire, with bleached tree skeletons juxtaposed against new growth of chaparral, pines, and oaks. The William Heise County Park portion is known for its scenic beauty and wildflowers, such as the Wildflowers of William Heise County Park. There are also openings that offer vistas of North Peak and other distant mountains.

What is the historical significance of the trail?

The most distinctive aspect of the trail is its connection to 'Kelly's Ditch,' a century-old waterworks project. This ditch was originally dug by Chinese laborers to channel runoff water from the Cuyamaca Mountains into the Cuyamaca Reservoir. You can still see remnants of the historic ditch itself, with the trail often following its path for the first two miles.

Does the trail connect with other paths?

Yes, the trail connects William Heise County Park and Cuyamaca Rancho State Park, offering various hiking options. Along its route, it also passes through sections of the Harrison Park Fire Road and the Playground Access Trail.

Are there options for longer or more strenuous hikes?

Absolutely. While a 5.6-mile point-to-point hike is considered moderate, an 11.2-mile out-and-back option is more strenuous, involving around 1000 feet of elevation gain and loss. For a longer journey with less substantial climbing, consider moving from south to north (from Lake Cuyamaca to William Heise County Park).

What wildlife might I spot on the trail?

The recovering ecosystem supports various wildlife. Hikers frequently report spotting deer along the trail. Keep an eye out for other local fauna that thrive in the chaparral and oak woodlands.

Is this trail suitable for beginners?

The trail is generally rated as moderate in difficulty. While some sections are relatively flat, others are rockier and involve switchbacks. Beginners with some hiking experience should be fine, especially on shorter segments. Longer out-and-back options can be more strenuous and might be challenging for absolute beginners.

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