Heather Farm & Lake – Iron Horse Trail junction loop from Pleasant Hill/Contra Costa Centre

If you're looking for a substantial, yet accessible, gravel biking route in the East Bay, the Heather Farm & Lake – Iron Horse Trail junction loop from Pleasant Hill/Contra Costa Centre is a popular route that delivers. This difficult 29.3-mile (47.2 km) gravel biking adventure features 3075 feet (937 metres) of elevation gain and takes approximately 3 hours and 23 minutes to complete. It's an excellent choice for experienced riders seeking a long, varied ride that connects urban convenience with natural beauty, offering a different kind of challenge than pure off-road trails.

What to expect on Heather Farm & Lake – Iron Horse Trail junction loop from Pleasant Hill/Contra Costa Centre

This loop primarily utilizes paved multi-use trails, so while it's listed as gravel biking, expect a smooth ride for the most part. The Iron Horse Trail, a central part of this journey, offers a wide, flat surface with minimal elevation changes, making it surprisingly approachable despite the overall distance and elevation. You'll cycle through diverse East Bay cities, passing marshy creeks with bird and ground squirrel sightings, and enjoying views of the distant Contra Costa County hills. Heather Farm Park itself provides a pleasant break with its two lakes and open grassy areas, while the Ygnacio Canal Trail offers shaded paths and glimpses of Mt. Diablo. The difficulty comes from the sheer distance and cumulative elevation, making it suitable for riders with good endurance rather than those seeking technical terrain.

Planning your visit

The accessibility of this route is a major draw. The trail system connects various communities and amenities, including BART stations, making public transport a viable option for reaching the starting point near Pleasant Hill/Contra Costa Centre. Parking is generally available at Heather Farm Park. Given the length, ensure you carry plenty of water, especially during warmer months. The paved nature of much of the route means it's enjoyable year-round, though spring offers the bonus of rolling green hills and California poppies along sections like the Contra Costa Canal Trail.

Trail details

• Distance: 29.3 miles (47.2 km)
• Elevation gain: 3075 feet (937 metres)
• Difficulty: difficult
• Estimated time: 3 hours and 23 minutes