The 2026 ENDURrun Prelim is a unique six-day, six-stage running event held in Waterloo, Ontario, and its surrounding communities. Designed as a preparatory challenge for the more demanding ENDURrun events later in the year, the Prelim offers runners a comprehensive test of endurance, speed, and versatility. Participants tackle a variety of race formats, including road, cross-country, trail, and track, over a total distance of 60 kilometers.

This event is renowned for its supportive community atmosphere, well-organized stages, and diverse terrain. Each stage is carefully crafted to challenge different aspects of a runner’s skill set, from technical trail running to fast-paced track racing. The Prelim is ideal for athletes seeking to experience the spirit of multi-day racing, build confidence, and prepare for longer endurance events. With leader bibs, finisher medals, and awards for top performers, the ENDURrun Prelim is both a competitive and celebratory experience.

The ENDURrun Prelim features six stages, each with distinct terrain and elevation profiles:

- **Stage 1 (10 KM Road Race):** Two loops on a paved, relatively flat course at RIM Park, Waterloo.
- **Stage 2 (7.5 KM Time Trial):** Out-and-back on mixed crushed gravel and paved surfaces at Riverbluffs Park, Cambridge.
- **Stage 3 (8 KM Cross Country):** Three loops on grass and trail with moderate elevation at Bechtel Park, Waterloo.
- **Stage 4 (10.4 KM Trail Run):** Four loops on technical hiking trails with significant elevation at Baden Hills, Wilmot.
- **Stage 5 (3 KM Track Race):** 7.5 laps on a standard rubberized track at St. David Catholic Secondary School, Waterloo.
- **Stage 6 (21.1 KM Half Marathon):** Three loops on a paved course with rolling terrain at RIM Park, Waterloo.

Courses range from flat and fast to hilly and technical, providing a comprehensive test of running ability.

- **Six unique stages over six days, totaling 60 KM**
- **Diverse race formats:** road, time trial, cross-country, trail, and track
- **Community-focused event with experienced volunteers and well-marked courses**
- **Comprehensive support:** aid stations, refreshments, and post-race amenities
- **Awards:** leader bibs, finisher medals, and top-three overall/Masters medals
- **Ideal preparation for the full ENDURrun series**