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Trail Running Calendar near Mountainside 2026-2027

Monthly updates for Mountainside

Get new running races (and updates) in your inbox every month.

Explore the top trail runs near Mountainside for 2026-2027! We've gathered 32 exciting races in the area. Check out our detailed list below to find your next local race.

January 2026
Jan
31
Sa

Frosty Fat Sass

Trail Run 5 km 3 hr 6 hr
February 2026
Feb
21
Sa

Febapple Frozen 50M

Trail Run 10 mi 20 mi 50 km 50 mi
March 2026
Mar
1
Su

Mahlon Winter Donut Trail Run

Trail Run 5 mi 10 mi
Mar
7
Sa

Squatchapple - West Orange, NJ

Trail Run 11 mi 20 mi 50 km 50 mi
Mar
7
Sa

Lenape Trail Run

Trail Run 34 mi
Mar
28
Sa

MCW Lenape Runventure

Trail Run 34 mi
Mar
29
Su

Morris County Empanada Trail Run

Trail Run 5 km 10 km
Mar
29
Su

The Fool's Trek/Rogaine

Trail Run 10 hr
Mar
29
Su

Urban Environmental Challenge

Trail Run 10 km
April 2026
Apr
4
Sa

Spring SOMO Timed Trail Race

Trail Run 3 km 6 km ... 3 hr 6 hr
Apr
11
Sa

Institute Woods 6K

Trail Run 3 km 6 km
Apr-Sep
28-1
Tu

XC Summer Series

Trail Run 5 km
May 2026
May
2
Sa

VCP 50K

Trail Run 50 km
May
19
Tu

XC Summer Series

Trail Run 5 km
May
24
Su

Forest Park Runners Classic Trail Race

Trail Run 4 mi
May
26
Tu

XC Summer Series

Trail Run 5 km
June 2026
Jun
2
Tu

XC Summer Series

Trail Run 5 km
Jun
9
Tu

XC Summer Series

Trail Run 5 km
Jun
16
Tu

XC Summer Series

Trail Run 5 km
Jun
20
Sa

XTERRA Transcend Trail Run

Trail Run 3 mi 6 mi 13 mi