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Routes
Bike touring routes & trails
United States
California
Alameda County
Castro Valley

Iron Horse Regional Trail Loop

Hard

4.6

(7543)

14,706

riders

Iron Horse Regional Trail Loop

03:15

52.7km

490m

Cycling

Cycle the challenging 32.8-mile Iron Horse Regional Trail Loop, gaining 1611 feet through diverse East Bay landscapes.

Last updated: February 26, 2026

Waypoints

A

Start point

Train Station

Get Directions

1

18.2 km

Iron Horse Trail

Highlight (Segment) • Cycleway

Wide well paved flat biking trail separate from roads, with a few safe crossings (sometimes shared with hiking) following a former rail line along the San Ramon Valley from Pleasanton via Dublin and Walnut Creek to Concord.

Tip by

B

52.7 km

End point

Train Station

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Way Types & Surfaces

Way Types

28.3 km

22.4 km

1.70 km

256 m

121 m

< 100 m

Surfaces

40.6 km

12.0 km

229 m

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Elevation

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (290 m)

Lowest point (50 m)

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Weather

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Thursday 7 May

20°C

12°C

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This route was planned by komoot.

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Frequently Asked Questions

Where can I park or access the Iron Horse Regional Trail Loop?

The Iron Horse Regional Trail connects nine cities and several BART stations, offering numerous access points. You can find parking in various towns along the route, such as Walnut Creek, Alamo, and Danville. Utilizing BART stations provides convenient public transport access to different segments of the trail.

Is the Iron Horse Regional Trail Loop dog-friendly?

Yes, the Iron Horse Regional Trail is generally dog-friendly. However, dogs must be kept on a leash at all times, and owners are responsible for cleaning up after their pets. Be mindful of other trail users, especially in crowded sections.

What is the best time of year to cycle the Iron Horse Regional Trail Loop?

The trail is enjoyable year-round, but spring and fall offer the most pleasant cycling conditions with mild temperatures. Summers can be hot, especially in the open sections, while winters are generally mild but can bring rain. Weekdays are typically less crowded than weekends.

Do I need a permit or pay an entrance fee for this trail?

No, there are no permits or entrance fees required to access and cycle the Iron Horse Regional Trail. It is part of the East Bay Regional Park District and is freely accessible to the public.

What is the terrain and difficulty like for cycling this loop?

The Iron Horse Regional Trail is almost entirely paved, wide, and features very gradual elevation changes, making it suitable for touring cyclists of all levels. As a former rail corridor, it's notably flat, with the entire loop involving only about 490 meters of elevation gain. This makes it an easy and comfortable ride, though some sections can feel a bit monotonous due to the lack of varied topography.

What amenities and points of interest are available along the route?

The trail passes through several towns like Walnut Creek, Alamo, and Danville, where you'll find numerous places to stop for restrooms, drinking fountains, dining, and shopping. A notable point of interest is the Iron Horse Trail itself, which follows a historic railway corridor. You can also visit the restored Southern Pacific Depot in Danville, which houses the Museum of the San Ramon Valley.

Does this loop connect to other trails?

Yes, the Iron Horse Regional Trail connects to other regional trails, such as the Contra Costa Canal Regional Trail. The route also passes through sections of the Iron Horse Regional Trail, Bay Area Ridge Trail - 02 - East Bay, Las Trampas to Mt. Diablo Regional Trail, and various segments of the San Ramon Valley Iron Horse Trail.

Are there any specific challenges or things to be aware of on this trail?

While generally easy, cyclists should be aware of potential crowding, especially on weekends and near town centers, requiring alertness. There are numerous traffic crossings in urban sections where you may need to wait. Some southern parts of the trail can also be quite windy. Carrying a map or using a mapping app is advisable to avoid missing turns.

Is the Iron Horse Regional Trail primarily a loop or linear route?

The Iron Horse Regional Trail itself is primarily a linear path, stretching about 32 miles through California's East Bay region. However, this specific tour is designed as a loop, utilizing sections of the Iron Horse Trail to create a circular cycling route.

Is the Iron Horse Regional Trail Loop suitable for families?

Absolutely. Its flat, paved surface and gradual elevation changes make it ideal for family cycling. The trail's width allows for shared use, and the numerous towns along the way provide convenient stops for breaks, food, and restrooms, making it a great option for a family outing.

Can I see wildlife along the trail?

While much of the trail passes through urban and residential areas, sections do offer opportunities for wildlife viewing. The northern end near Concord, which hugs Walnut Creek, features marshland where you might spot various birds like ducks, geese, and egrets.

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