Olson was not very rideable, lots of deep drifts, some areas were packed down by foot traffic, but one could only go so far before hitting deep snow. Ventured over to the A2 loop starting at Leslie. Takes some effort navigating the icy road and then knee-deep snow to get to the trail's entrance. Once on the trail, it was rideable by fat bike. Made it as far as the private road/Bandemere Park/freeway exit. Turned back at that point as it was running late for me. The tricky part was once getting past the tunnel, that area through the pines had some soft spots. Don't ride the trail too fast or you can endo in a soft spot, or if you get too close to the edge of what's packed down the snow can be very deep and soft.