Trail Running calendar near Lucas Valley-Marinwood 2025-2026

Peacock Gap Trail Run, hosted by Inside Trail Racing, takes place at China Camp State Park in San Rafael, CA. The event offers 30K, Half Marathon, and 10K distances, with a field cap of about 275 runners. Runners traverse twisting single-track trails and non-technical fire roads through forested hil..

ZombieRunner Quarry Lakes is a multi-distance running festival held at Quarry Lakes Regional Recreation Area (Ensenada Pavilion) in Fremont, CA. The lineup includes 5K, 10K, Half Marathon, 30K, Marathon, plus youth and Kids Run events. The course starts in the scenic Quarry Lakes area and follows th..

Hunter S. Thompson Fear & Loathing in San Francisco is an urban ultramarathon offering 50K or 50 miles. Located in San Francisco, the single-loop course starts and finishes atop Twin Peaks, with the city spread out beneath.The 50K route is about 99% city streets; the 50-mile option includes some tra..

2025 Hark the Herald Half Marathon & 10K, the 37th annual edition, takes place at Angel Island State Park, Belvedere Tiburon, California. The Half Marathon is two loops on a hilly trail; the 10K is a single loop. The event is limited to 400 participants, creating an intimate atmosphere with panorami..

Summit Rock offers 5K, 10K and half marathon routes through Sanborn County Park in the Santa Cruz Mountains near Saratoga, California. Runners travel along miles of single-track trails under a redwood canopy, with the half-marathon and 10K routes climbing to peak viewpoints. The course emphasizes tr..

Woodside Ramble, held at Huddart County Park in Woodside, CA, offers 10K, half marathon, 35K, and 50K trail races through Huddart and Wunderlich Parks along redwood-canopy trails, including Crystal Springs and Skyline Trails, with streams, canyons, and sweeping ridgeline views. The course features m..

Brazen Racing’s Almost New Year’s Eve is a trail-running event at Lake Chabot in Castro Valley, California. Runners may choose from a Half Marathon, 10K, or 5K, with hikers and walkers welcome. The race navigates Lake Chabot’s scenic trails, delivering a festive, outdoor atmosphere as participants c..

Brazen New Year's Day 2026 takes place at Lake Chabot in Castro Valley, California. Runners can choose from a half marathon, 10K, or 5K on Lake Chabot’s scenic trails. The course loops around the lake and is described as scenic and invigorating, offering a family-friendly atmosphere as participants..

The Hacienda Hills Trail Run - Winter is a trail running event held at Almaden Quicksilver County Park near San Jose, California. It offers nine race distances ranging from a Kids Run and 1 Mile to challenging 50K and Marathon options, all featuring increasing elevation gain through scenic Northern..

The Crystal Springs Trail Run takes place on Sunday, January 18, 2026, at Huddart Park (Werder Shelter), 1100 Kings Mountain Road, Woodside, CA 94062. The event offers the following distances: 8K - Elevation gain 710'; Single Track 48%, Dirt Road 40%, Asphalt 12% Half Marathon - Elevation gain 2,1..

Crystal Springs Trail Run is a multi-distance trail race in Woodside, California, weaving through Huddart Park, King’s Mountain, and Bear Gulch. The event offers 8K, Half Marathon, 35K, Marathon, 50K, and a free Kids’ Run. Runners traverse towering redwoods, lush ferns, and varied terrain, with cour..

Pacifica Foothills Trail Run takes place at San Pedro Valley Park, Pacifica, CA. Runners choose among 10K, half marathon, and 30K, all on dirt trails atop Mt. Montara and surrounding foothills.The course is mostly technical single-track with significant elevation gain (approximately 1,200 ft for the..

Brazen Racing's Coyote Hills event takes place at Coyote Hills Regional Park in Fremont, California. The weekend offers three distances: a half marathon, 10K, and 5K, with walkers welcome and a Half Marathon Hiker Division for those taking longer than four hours. The course features a mix of paved,..

Mt. Umunhum Trail Conquest-Winter is an endurance trail running event in San Jose, California, starting at the Hacienda Entrance of Almaden Quicksilver County Park. Runners can choose 5K, 7 Mile, half marathon, 30K, trail marathon, 50K, and a Kids Run.The 30K climbs Bald Mountain, while the Trail Ma..

The Bay Breeze race takes place on February 14, 2026, at San Leandro Marina Park, 14001 Monarch Bay Dr, San Leandro, CA 94577. The event offers the following distances: Half marathon 10K 5K A remote-run option is listed for the event. All race distances start and finish at San Leandro Marina Par..

Redtail Ridge at Lake Chabot Regional Park in Castro Valley, CA offers multiple distances: 5K, 10K, Half Marathon, 30K, and 50K. The course unfolds on a mix of moderately technical dirt trails and non-technical fire roads, with some paved sections, and features rolling hills that reward pacing and t..

Montara Mountain Trail Run takes place at San Pedro Valley Park in Pacifica, California. The event offers 10K, Half Marathon, 20 miles, Marathon, 50K, and a Kid’s Run, weaving through the area’s undisturbed Coastal Mountain Habitat with ocean views. Elevation gains range from about 1,200 feet (10K)..

Zoom Angel Island is a trail running event on Angel Island, accessible via chartered ferries from Tiburon, California, offering spectacular views of Marin County and San Francisco. Distances include 5 miles, 10 miles, 15 miles, plus a Kids Run (free). The hilly course circles the island and climbs M..

The Marin Ultra Challenge is Inside Trail Racing’s premier Marin County long-distance trail race, offering 50-mile and 50K options. The route starts at Rodeo Beach and loops through the Marin Headlands, Mt. Tamalpais, and Muir Woods, delivering coastal and inland vistas, varied terrain from exposed..

2026 Napa Valley Trail Marathon, Half Marathon & 10K takes place at Bothe-Napa Valley State Park in Saint Helena, California. The event offers three trail distances: marathon, half marathon, and 10K. Runners tackle lush single-track with hills, streams, and rocky sections; the course is marked with..