Retto Route runs West to East
The Retto Start is at Nature's Valley
TrailFactor of 2.0
The TrailFactor indicates the degree of increased resistance applied by the trail on a runner when compared to a flat conventional road running course. A TrailFactor of 2.0 means completing the Otter can take twice as long as the equivalent distance on road!
Four River Crossings
There are four rivers that have to be crossed, including the infamous Bloukrans River which involves a swim. We will have safety personnel and equipment set up only at Bloukrans to assist and make sure you safely cross this segment.
2,600m Elevation Gain
A total gain of over 2,600m over full route, including ±7,000 ascending steps. Steep enough to force the strongest runners to walk.
Eleven Significant Climbs and Descents
There are eleven climbs of more than 50m elevation gain with 3 climbs exceeding 100 meters.
6 Safety Checkpoints
The pace chart and pace bracelets provided will help you keep track of your targeted finishing time and will help you to stay ahead of all six cut-off points.