100 mi
Mammoth 100 Mile
Sat, Sep 20 · 4:00 AM
$238.24
100 MI
- Past race
- Ultra
- Trail
Rivers Edge Ultra 2025
- Spruce Grove, Alberta
About Rivers Edge Ultra 2025
The River's Edge Ultra is a scenic trail running event held at Riverside RV Park in Spruce Grove, Alberta. Scheduled for September 20, 2025, it offers multiple race distances ranging from 12km up to 100 miles, traversing single-track trails along the North Saskatchewan River Valley with river crossings and diverse terrain. Proceeds benefit the Olive Tree Projects, supporting a maternity centre in Haiti.
Participants will experience varied loops and terrain featuring river crossings and beaver dams, with aid stations ensuring runners never travel more than 12km without support. This event caters to trail runners seeking challenging and picturesque courses.
Distances and events
100K
Magilla 100km
Sat, Sep 20 · 4:00 AM
$173.83
80K
Wallace 80km
Fri, Sep 19 · 8:00 PM
$163.10
50K
Muskeg 50km
Fri, Sep 19 · 8:00 PM
$152.37
21K
Koda 21km
Fri, Sep 19 · 8:00 PM
$130.90
12K
Half Yak 12km
Fri, Sep 19 · 8:00 PM
$109.43
5K
Muskrat Kids Run 5km
Fri, Sep 19 · 8:00 PM
$18.19
3K
Muskrat Kids Run 3km
Kids OnlyFri, Sep 19 · 8:00 PM
$18.19
Prices from the organizer. Please check the official website for up-to-date times and pricing.
Highlights
Various race distances: 12km, 21km, 50km, 80km, 100km, 100 miles
Scenic single-track trails through North Saskatchewan River Valley
River crossings and beaver dams along the course
Proceeds support Olive Tree Projects' maternity centre in Haiti
Aid stations keep runners well-supported every 12km or less
Course
- Surface
- Trail
- Location
- Spruce Grove, Alberta
Course details
- Loops ranging from 9km to 20km all returning to Start/Finish
- Varied terrain including river crossings and beaver dams
- Strategically placed aid stations throughout
- Challenging trail routes providing scenic views
- Detailed elevation and loop info available on official website
More races like this
Listing freshness
The Running Directory combines organizer-provided details, official race links, and ongoing listing research. Always confirm final dates, prices, times, and course details with the race organizer before registering.
Last updated: October 2, 2026
Official registration(opens in a new tab)