Bob Siegel Launched San Francisco Walking Trails

The former instructor created a network of city paths to help residents explore San Francisco on foot.

Updated on Oct. 4, 2026 in Hiking

Bold vector editorial illustration showing a winding stone path ascending a steep San Francisco hillside near coastal cliffs. — Bob Siegel launched a 17-mile trail network in San Francisco in 2019, encouraging local residents to explore the city's diverse neighborhoods on foot. AI Illustration. Upload story photo >

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Do you believe community-led projects like public walking trails improve your local area?

Bob Siegel officially launched the 17-mile Crosstown Trail in San Francisco on June 1, 2019. The project aimed to encourage local residents to rediscover the city by walking through its diverse neighborhoods.

Why it matters

Siegel sought to foster a deeper connection between San Franciscans and their urban environment by creating accessible, low-cost walking routes. His efforts have expanded to include additional multi-mile paths across the city.

The original Crosstown Trail spans 17 miles, while subsequent additions include the 15-mile Double Cross trail and the 38-mile Roundabout loop. Building these routes cost less than $600, relying on digital mapping rather than traditional signage.

The players

Bob Siegel

He is an 86-year-old former City College instructor who founded the San Francisco trail system.

The details

The trail network connects various landmarks including Lands End, Candlestick Point, and the Presidio without requiring physical infrastructure markers. Organizers recruit volunteers and manage the project through informal coffee meetings and online maps.

Bob Siegel retired from City College in 2003.
The Crosstown Trail officially launched on June 1, 2019.
The 15-mile Double Cross trail launched in 2024.
The 38-mile Roundabout loop arrived in 2025.
Walktober events occur in October 2026.

Culture Shift

This project mirrors a broader movement toward utilizing existing urban infrastructure for recreational walking rather than relying on dedicated, remote nature trails. It signifies a shift in how residents engage with city geography by prioritizing accessibility and digital navigation tools.

Residents can utilize free digital maps to walk across the city, potentially changing their daily commuting or exercise routines. The lack of physical trail markers means hikers must rely on mobile apps to navigate the routes successfully.

The takeaway

Creating community resources can be achieved with minimal financial investment by leveraging existing public spaces and digital tools. Residents looking to explore their city can adopt these low-barrier methods to improve their personal health and local knowledge.