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 Jul 25

Calero Hills Trail Fest

...

Trail running at Calero County Park with multiple distances across single track and dirt paths, significant climbs, aid stations and free parking at the park.

Saturday Aug 1

Rodeo Valley Trail Run

A trail race in the Marin Headlands with 8K, half, 30K and 50K options along coastal single-track and fire roads, marked courses, cupless aid stations, and a 350 runner capacity.

Sunday Aug 2

Skyline 50k Endurance Run

Castro Valley

Half Marathon

50 km

Trail races of 50K and 21K in Castro Valley that start and finish at Lake Chabot Marina. Organized by Scena Performance, the event features community volunteer aid stations, finisher swag, GPX files, and UTMB indexing.

Saturday Aug 8

Bear Creek Run

Bear Creek on August 8, 2026 offers 5K, 10K and a 13.32-mile half marathon in the Briones Regional Park area, with a virtual Remote Runner option. Entry windows and fees are listed for each race.