Tri-Valley Loop via Iron Horse and Arroyo Mocho Trails

The Tri-Valley Loop offers varied terrain. The Iron Horse Trail section is mostly paved and flat, ideal for steady cycling. However, the western part of the Arroyo Mocho Trail, about 5 miles, has a loose gravel surface interspersed with paved areas. East of El Charro Road, the Arroyo Mocho Trail runs alongside major roadways but is separated.

The route is approximately 43.6 km (27 miles) long and typically takes around 2 hours and 35 minutes to complete by touring bicycle, depending on your pace and stops.

The loop is generally considered moderate. While the Iron Horse Trail is very beginner-friendly with its paved, flat surface, the Arroyo Mocho Trail includes sections with loose gravel. Beginners should be comfortable riding on gravel or consider a bike with wider tires for those segments.

Given the mix of paved and gravel sections, a touring bicycle with wider tires is recommended, especially for the gravel portions of the Arroyo Mocho Trail. Road bikes might struggle on the loose gravel.

Spring and fall are generally the best seasons for cycling the Tri-Valley Loop due to mild weather. If you ride in summer, it's advisable to start early in the day and carry extra water, as some parts of the Arroyo Mocho Trail have little to no shade.

The Iron Horse Trail, which is part of this loop, connects to multiple Tri-Valley downtowns and BART stations (Dublin/Pleasanton and Pleasant Hill), offering various access points. Parking is available at many of these locations along the trail corridor.

No, there are no specific permits or entrance fees required to cycle the Tri-Valley Loop via Iron Horse and Arroyo Mocho Trails.

While the Iron Horse Trail is generally dog-friendly, always ensure your dog is on a leash and you clean up after them. Check local regulations for specific rules on the Arroyo Mocho Trail sections.

The loop offers a diverse experience. The Iron Horse Trail provides a blend of urban and natural views, passing through residential areas, business parks, and open spaces. The Arroyo Mocho Trail transitions from natural areas with spring wildflowers and birdwatching opportunities to a more neighborhood feel in Livermore, featuring old architecture, citrus trees, and grapevines near local wineries.

Yes, the loop connects to several downtown areas like Danville and Livermore, offering numerous opportunities for stops at boutiques, restaurants, and local wineries in the Livermore Valley.

Yes, the route incorporates sections of the Iron Horse Regional Trail and the Arroyo Mocho Trail. It also passes through parts of the Isabel Avenue Trail, Arroyo del Valle Regional Trail, and various smaller segments like Winery Loop and South Livermore Trail.