Articles

Belgian Ultrarunner Karel Sabbe's Record-Breaking Pacific Crest Trail Run Showcased in New YouTube Documentary

Explore Karel Sabbe's record-breaking Pacific Crest Trail run in a riveting documentary. Jour..

Trail Running: How it Can Help Reduce Stress and Anxiety

Trail running is an effective way to reduce stress, anxiety, and improve physical and mental he..

Trail Running vs. Road Running: Which One Is Right For You?

When it comes to running, there are two primary options to choose from: trail running and road..

Haunted Hills 10K Redwood City

Name: Haunted Hills 10K Redwood City
Start: 2025-10-25
End: 2025-10-25
Location: Redwood City

Redwood City, United States • 25 Oct 2025

Event overview

The Haunted Hills 5K & 10K is a Halloween-themed walking and running event in Redwood City, CA, on October 25, 2025. It is organized as a trick-or-treat style course for adults and families. Participants form teams of 1 to 5 people and move through decorated neighborhoods while locating displays and answering simple multiple-choice questions at checkpoints. Participants are asked to bring a headlamp or flashlight. Refreshments and socializing are available at the finish area.

Course, distances and registration

Location: 939 Valota Rd., Redwood City, CA.

Distances:

5K
10K

The 5K route includes about 20 checkpoints. The 10K route includes about 36 checkpoints. Registration closes on Fri, Oct 24 at 11:59PM PT. Visit the organization's website for the most recent information.

United States California Redwood City

Race information

Registration

10 km

10k

5 km

Visit the organization's website for the most recent information.

Trail runs nearby

Saturday May 2

Hacienda Hills Trail Run - Spring

...

A full-day trail event at Almaden Quicksilver County Park on May 2, 2026, offering distances from a kids run to a 50K with marked dirt roads, single-track sections, aid stations, drop bag service at the Hacienda start, and free parking.

Saturday May 9

Grizzly Peak Trail Run

...

Experience the scenery of Tilden Regional Park at the Grizzly Peak Trail Run. Choose from various distances including a 50K and marathon starting from the shores of Lake Anza in Berkeley.

Saturday May 9

Quicksilver Endurance Runs

San Jose

50 km

100 km

Trail ultramarathons in Almaden Quicksilver County Park on May 9 2026, offering a 100K and a 50K with substantial elevation gain, course maps and GPX files, USATF sanctioning, aid stations, volunteer support, swag and a post race party.

Saturday May 9

Pathways Run 10K

The 24th annual Los Altos Hills Pathways Run/Walk is a trail run and walk on May 9, 2026 at Westwind Community Barn in Los Altos Hills, CA. Routes include 5 km and 10 km with course maps and past results available online.