Perfect fall day for a hard effort. A light rain overnight made the trail positively tacky, 15 degrees C, overcast.
My watch mapped the run at 8.06 km (FKT route posted as 9 km). There are no variations of this single track route. Yesterday, I mountain biked the route and my watch mapped it at 9.55 km. Following my run today I mountain biked the route again and my watch mapped it at 9.26 km. I'm now convinced my Suunto Ambit3 Vert needs to be replaced.