Out on the CRFs this weekend with my oldest (21) boy. Almost 40F, but the ground in the woods was frozen solid. No traction at all once you got through the snow, leaves, and grass.
The bike is constantly out of line and sliding. Good practice.
I bounced off of one tree on the way down, but luckily it was just a glancing blow. Plenty of close calls though.
Here he is on our regular track -
And in the woods after finding a small tree hidden under the snow -
Fun day, but I'm a little sore this morning.