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San Marino

The best gravel rides around San Marino

5.0

(1)

50

riders

13

rides

Gravel biking around San Marino offers diverse terrain across its small republic, characterized by rocky elevations, dense forests, and varied landscapes. The region's topography includes the iconic Mount Titano, providing challenging climbs and rugged paths. Cyclists can explore natural and semi-natural grasslands, shrubland, and woodland pathways, often encountering steep slopes and historic stone routes. This varied environment provides a rich backdrop for gravel cycling, blending natural beauty with historical intrigue.

Best gravel bike trails around San Marino

  • The most popular…

Last updated: May 16, 2026

5.0

(1)

17

riders

#1.

Mueller Tunnel – Mueller Tunnel loop from Allen

46.7km

04:38

1,710m

1,710m

Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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Hard

Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Hard
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Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Hard

Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Hard

Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Moderate
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Popular around San Marino

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Tips from the Community

Traveler
August 25, 2025, Mueller Tunnel

Short tunnel on the eastern slope below San Gabriel Peak, part of the old Mt Lowe Motorway, that was never paved. The tunnel is very short, so you don't have to worry about bringing light. The road continues to the trailhead half a mile uphill.

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fresh pavement!

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Just below the Mtβ€―Wilson Trailhead on Red Box Road, this overlook and memorial is a perfect place to pause. Sit and take in sweeping views of the San Gabriel Valley, and read the memorial plaque honoring early conservation efforts.

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Henninger Flats sits along the road with views of Altadena. You’ll pass by it while climbing the Mt. Wilson Toll Road and can take a moment to catch your breath while enjoying the views. The route features a steady climb with minimal shade, so it’s best to start early, especially in summer. At the top, enjoy panoramic views of the San Gabriel Valley and explore the area, which includes a visitor center, picnic spots, and a tree nursery.

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For a ride with history and views, check out the Ye Alpine Tavern ruins in the San Gabriel Mountains. Once a popular mountain resort, it burned down in 1936 and was later demolished, but you can still spot the stone fireplace, foundation, and water tank.

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Zachary
June 23, 2025, Mueller Tunnel

This tunnel was blasted into existence in 1942 to form the old Mount Lowe Motorway.

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Climb out of the Brookside Golf Club area and into the Pasadena suburban area. This climb has a nice shoulder and is lined with trees.

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Great view of Downtown LA. The climb up into the hills to reach the viewpoint is challenging, but it is worth the effort for the excellent vistas.

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Frequently Asked Questions

How many gravel bike trails are available around San Marino?

San Marino offers a variety of gravel biking opportunities, with over 10 routes listed on komoot. These routes cater to different skill levels, though most are considered challenging due to the region's hilly terrain.

What is the general difficulty level of gravel biking in San Marino?

Gravel biking in San Marino is generally considered challenging. Out of the 13 routes available, 11 are rated as difficult, and 2 are moderate. The terrain often includes rocky elevations, steep climbs, and rugged paths, making it suitable for riders with good fitness and experience. For example, the Mueller Tunnel – Mueller Tunnel loop from Altadena features significant elevation gain.

Are there scenic viewpoints along the gravel bike trails in San Marino?

Yes, San Marino's gravel bike trails are renowned for their breathtaking panoramic views. Routes often traverse areas around Mount Titano, offering vistas that stretch across the surrounding hills and valleys, all the way to the Adriatic Sea. Specific viewpoints like the Cesta viewpoint and Borgo Maggiore viewpoint provide stunning perspectives over the city and its natural surroundings.

What natural attractions can I see while gravel biking in San Marino?

While gravel biking in San Marino, you can explore diverse natural environments. The region features dense forests, woodland pathways, and natural parks like the San Marino Nature Park and Monte Cerreto Ecological Oasis. You might also encounter the Bosque del Rio Hondo, offering a chance to immerse yourself in nature.

Are there any historical sites or landmarks to explore on a gravel bike ride?

Yes, San Marino's routes often integrate with its rich history. You can cycle past or near historic centers and fortresses. Notable historical sites include the Historic Colorado Street Bridge and the Mount Lowe Railway Ruins, offering glimpses into the region's past.

Are there any family-friendly gravel bike trails in San Marino?

Given the challenging nature of most gravel trails in San Marino, with 11 out of 13 routes rated as difficult, truly family-friendly options for young children or beginners are limited. However, some guided cycling tours offer e-bikes, which can make tackling uphill sections more manageable for those with less experience or fitness. Always check the route's difficulty and elevation profile before setting out with family.

Can I find circular gravel bike routes in San Marino?

Yes, many of the gravel bike routes in San Marino are designed as loops, allowing you to start and end at the same point. For example, the Ye Alpine Tavern ruins – Inspiration Point loop from John Muir High School is a popular circular option that offers substantial climbing and scenic views.

What are the options for parking when gravel biking in San Marino?

While specific parking locations are not detailed for every route, San Marino, being a popular tourist destination, offers various public parking facilities, especially near its historic centers and attractions. It's advisable to research parking availability near your chosen starting point, particularly in towns like Borgo Maggiore or the city of San Marino itself.

What is the best time of year for gravel biking in San Marino?

San Marino's varied climate means the best time for gravel biking is typically during the spring (April to June) and autumn (September to October) months. During these periods, the weather is generally mild and pleasant, avoiding the intense heat of summer and the colder, potentially wetter conditions of winter. This allows for comfortable riding and clear views.

What do other gravel bikers enjoy the most about gravel biking in San Marino?

The gravel biking experience in San Marino is highly rated by the komoot community, with an average score of 5.0 stars. Riders frequently praise the unique blend of challenging terrain, the stunning panoramic views, and the opportunity to explore both natural beauty and historical sites. The diverse landscapes, from rocky elevations to dense forests, are often highlighted as key attractions.

Are there any routes that offer a mix of natural beauty and urban exploration?

Yes, several routes in San Marino offer a blend of natural landscapes and proximity to urban or historic areas. For instance, the Pasadena Historic City Hall – View from Mount Lukens loop from Memorial Park allows you to start near a historic city center and venture into more natural, elevated terrain, providing a diverse riding experience.

Can I find routes with significant elevation gain for a challenging ride?

Absolutely. San Marino's mountainous terrain, centered around Mount Titano, means many gravel routes feature significant elevation gain, perfect for a challenging workout. The Arroyo Seco Bike Trail – Verdugo Peak loop from South Pasadena, for example, includes over 1200 meters of ascent, making it a demanding ride for experienced gravel bikers.

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