The Western Greenway 5K Trail Run/Walk

Celebrate Halloween with a spooktacular day on the trails! The Waltham Land Trust invites you to celebrate Halloween in the best way possible — moving through nature, in costume (if it’s safe to run in), and helping protect Waltham’s beautiful open spaces.

Since 2013, our Western Greenway 5K has brought together people of all ages to enjoy 3.1 miles of gorgeous fall scenery. The course winds through Beaver Brook North Reservation and Rock Meadow, with stunning views of cattail marshes, forests, vernal pools, and open meadows.

The 5K (3.1 mile) course goes through and around a variety of habitats in Beaver Brook North Reservation and Rock Meadow, including cattail marshes, forests, vernal pools, and open meadows. The race course will be the same year to year unless conditions change.

Going forward the Land Trust is planning to host the event annually on the last Sunday in October at 12:00pm (noon), subject to permitting requirements from Waltham, Belmont, and DCR. Please save the date.

NEW since 2025! 🦇
Before the main race kicks off, kids ages 10 and under can join our 50-yard Monster Dash at 11:30 am — a quick, fun sprint where every child gets a small treat for participating. Free for children who attend with an adult running the 5K, $5 suggested donation otherwise. Perfect for little ghosts and goblins who want in on the action!

Want to run with your friends? Sign up together under one team name!

T-shirts for the first 100 runners to register and all race sponsors!

Thank you for being part of the Western Greenway 5K and supporting the Waltham Land Trust!