The best cycling routes in Thornewood Open Space Preserve

Thornewood Open Space Preserve offers a diverse selection of 39 touring cycling routes. These range from easier rides to more challenging climbs, catering to various skill levels.

The routes in Thornewood Open Space Preserve are predominantly moderate to difficult, reflecting the area's rolling hills and elevation changes. There are 16 moderate routes and 20 difficult routes, with a few easier options available for a more relaxed ride.

While many routes feature significant elevation, there are a few easier options suitable for families or those new to touring cycling. These routes typically stick to less steep sections, offering a pleasant experience amidst the oak woodlands.

Distances vary, with routes like the Old La Honda Road – Old La Honda Road loop from Jasper Ridge Biological Preserve covering 11.2 miles (18.0 km) with over 530 meters of elevation gain. Longer, more challenging rides, such as the Old La Honda Road – Old La Honda Road loop from West Menlo Park, can extend to nearly 70 km with over 1150 meters of climbing.

Yes, many of the touring cycling routes in the preserve are designed as loops, allowing you to start and end at the same point. Examples include the Alpine Road loop from Enid Pearson-Arastradero Preserve, which offers a moderate 13.2 km ride.

The routes offer scenic views of oak woodlands and distant vistas. You can also pass by historical points of interest, such as the Woodside Store (Historic Site), which is featured on routes like the Portola Road – Woodside Store (Historic Site) loop from Enid Pearson-Arastradero Preserve.

The preserve's Mediterranean climate makes it enjoyable for cycling for much of the year. Spring offers lush greenery and wildflowers, while fall provides cooler temperatures and clear skies. Summers can be warm, so early morning rides are often preferred. Winters are generally mild, though occasional rain can affect trail conditions.

Given the rolling hills and potential for varied weather, it's advisable to bring plenty of water, snacks, sun protection, and layers of clothing. A basic bike repair kit and a fully charged phone are also recommended for safety.

The area is highly rated by the komoot community, with an average score of 4.7 stars from over 30 reviews. Reviewers often praise the challenging climbs, scenic roads, and the opportunity to connect multiple preserves, such as on the Old La Honda Road – Portola Valley loop from Enid Pearson-Arastradero Preserve.

Many routes start from established preserves or public access points, such as Jasper Ridge Biological Preserve or Enid Pearson-Arastradero Preserve, which typically offer parking facilities. It's always a good idea to check specific route details for recommended starting locations and parking availability.

While many touring cycling routes utilize paved roads, some sections may include unpaved paths. After rain, unpaved sections can become muddy or slippery. Paved roads are generally fine, but caution is advised on descents due to potentially wet surfaces. It's best to check local weather conditions before heading out.