Iron Horse and Madrone Trail Loop

This loop offers a diverse mountain biking experience. The first part, the Iron Horse Trail, is mostly paved, wide, and relatively flat, built on a former railroad right-of-way, making it generally easy. In contrast, the Madrone Trail within Las Trampas Regional Wilderness is unpaved, with dirt and gravel fire roads and some singletrack. It's rated moderate to hard due to very steep climbs and descents, switchbacks, and technical sections. Expect it to be dusty or slippery depending on recent weather.

The route is approximately 23 kilometers (14.4 miles) long with about 446 meters (1,463 feet) of elevation gain. Given the varied terrain, including challenging sections on the Madrone Trail, most mountain bikers can expect to complete it in around 2.5 to 3.5 hours, depending on their pace and skill level.

A common access point for this loop is near Camille Avenue in Alamo, which provides a good starting point for connecting to both the Iron Horse and Madrone Trails. You can also look for parking options near Hemme Station Park or other public access points along the Iron Horse Trail.

The loop combines sections of varying difficulty. While the Iron Horse Trail portion is very beginner-friendly, the Madrone Trail is considered moderate to hard due to its steep grades and technical elements. Beginners might find the Madrone Trail challenging. It's recommended for riders with some experience in mountain biking.

Spring and fall are generally the best times to ride this loop. The weather is milder, and the scenery is vibrant. Summer can be very hot, especially on exposed sections, and the trails can be dusty. Winter rides are possible, but rain can make the unpaved sections of the Madrone Trail very muddy and slippery.

Yes, dogs are generally allowed on both the Iron Horse Trail and within Las Trampas Regional Wilderness, which includes the Madrone Trail. However, they must be kept on a leash at all times. Always clean up after your pet.

There are no entrance fees or permits required to access Las Trampas Regional Wilderness for day use. However, always check the East Bay Regional Park District website for any updated regulations or specific activity permits if you plan anything beyond standard trail use.

The loop offers a striking contrast in scenery. The Iron Horse Trail passes through urban and residential areas, business parks, and along greenbelts. Once you transition to the Madrone Trail, you'll enter a more rugged wilderness with shaded woodlands, oak forests, and open meadows, offering spectacular vistas of Mount Diablo and the surrounding East Bay.

Yes, this route utilizes significant portions of the Iron Horse Regional Trail and the Madrone Trail. It also passes through sections of the Las Trampas Ridge Trail, San Ramon Valley Iron Horse Trail, and the Virgil Williams Trail, among others, offering connections to a wider network within the regional park.

Facilities are more readily available along the Iron Horse Trail, which passes through developed areas and parks like Hemme Station Park. Once you enter the more remote sections of the Madrone Trail in Las Trampas Regional Wilderness, amenities become scarce. It's advisable to carry sufficient water and snacks for the entire duration of the ride.

Given the varied terrain and potential for challenging sections, you should bring a well-maintained mountain bike, a helmet, plenty of water, snacks, basic bike repair tools (spare tube, pump), sun protection (sunscreen, sunglasses), and appropriate clothing layers. A first-aid kit and a charged phone are also highly recommended, especially for the more remote Madrone Trail sections.