Trail Running calendar near Williamstown 2025-2026

Take on the Holmdel Classic in Holmdel Park for a rugged trail challenge: choose the 50 km ish or the Halfish over multi lap loops that wind through roots, rocks and The Bowl. All proceeds support MissionCleanWater.

Run a festive 3 mile loop along the Manayunk canal on Dec 13 and bring canned goods to support North Light Community Center. Try Brooks shoes, sip hot chocolate and show up in your most festive holiday gear.

Naked Nick at Blue Marsh Lake offers 25K and 50K trail races on mostly single track with lollipop loops and winter mud or snow possible. Aid stations, chef prepared post race food and German style finisher mementos add charm.

Frosty Looper invites you to an 8 hour timed loop at Cooper River Park, with views of the Philadelphia skyline and the lake. Run as many 3.75 mile laps as you can in this friendly winter endurance challenge.

Set sail for Blackbeard's Bounty Endurance Race in Pennsburg PA on December 20, 2025, and tackle timed 4 hour or 8 hour looped runs on scenic gravel trails. Enjoy pirate themed fun, post loop grog, and a race shirt and medal.

Join the Sierra Club Lancaster Polar Bear 5K trail run and hike on January 10 for a chilly, scenic outing with some hills at Lancaster County Central Park. Chip timed and dog friendly, the event raises funds for local environmental grants.

Take on rugged trails at Killens Pond State Park in Felton Delaware during the Angela Ivory Memorial Trail Runs on January 24 and 25 2026. Distances include a 50k, 100 Miler and 24 Hour event; 50k is currently full.

Run four 5k trail races at Elephant Swamp Trail in Monroeville, NJ from Feb 22 to Mar 15, 2026. Series scoring, end of series awards and a finisher medal at each race plus hot chocolate and a discount for full series.

Naked Bavarian is an ultra trail at Blue Marsh Lake in Leesport, PA with 20 and 40 mile options on mostly single track and gravel. Enjoy rugged climbs, supportive aid stations and a German style finisher memento.

Tackle the HAT Run 50K, a scenic and challenging trail race in Havre de Grace on March 21, 2026. Expect varied terrain, nearly 4,400 feet of climbing and a few stream crossings that keep the adventure real.

Tackle scenic, challenging single track trails in Wissahickon Valley Park with half and full marathon options. Expect rolling hills, technical sections, a finisher medal and a community focused race that supports local youth programs.

Join the Great Marsh Mud Mosey in Elverson on April 11 for a muddy 5K or 1 mile walk through marsh, woods and farmland with a grassy finish. Small field and festival vibe with proceeds benefiting the Great Marsh Institute and ChesCo Search..

Run or walk the scenic Institute Woods 6K in Princeton on Saturday, April 11, 2026, starting at Princeton Friends School. Field capped at 200 and registration opens December 6; enjoy trails, refreshments after the run, and T shirts for earl..

Hit the rolling, rugged singletrack at Rockland Rad Run Sunday April 12 2026 at Forever Farm in Mertztown PA, a trail running festival for all abilities. Choose a marathon, half, 10k or 5k then relax with postrace food and a free drink.

Join the Screamin' Hill Scramble 5K at Screamin' Hill Brewery on April 18, 2026 for a chip timed cross country style run over groomed trails and short cut grass. Finishers earn a coaster medal and each entry includes a custom tech shirt plu..

Take on a 50 km out and back along the scenic Schuylkill River Trail from Mont Clare through Valley Forge to Conshohocken. Run solo or with a 3 to 6 person relay team, enjoy aid stations, chip timing and finishers medals.

Join the Patriot Power 5K on April 29, 2026 in Reading, PA to support veterans with proceeds to Team RWB. Enjoy vendor tables, bib and shirt pickup, a finisher medal and a post race dinner and beer, or join virtually with a mailed kit.

Run or walk the fifth annual Green Traill 5K in Easton on May 3, 2026 at Easton Cemetery, a volunteer run raising funds for Friends of Historic Easton Cemetery. Enjoy a timed 5K, a 2 mile walk, kids fun run and post race refreshments.

Race4Warriors on May 9 2026 in Lewes DE offers 5K, 10K and half marathon with Run, Race Walk or a Heavy March through Cape Henlopen State Park and Fort Miles. Finishers get a medallion and a lively post race party with bands and vendors.

Run the Dirty German Endurance Fest in Pennypack Park, Philadelphia with 25K, 50K and 50M options on a scenic figure eight course along Pennypack Creek. Enjoy finisher swag, chef made post race food and live accordion entertainment.