The trail is in good shape until about a half-mile from the trailhead. At that point there is significant blowdown. Two large, uprooted trees completely block the trail and runoff has obscured the trail path. I hiked on both sides and past the trees and could not pick up the trail. Eventually, I back-tracked to about 40 feet from where the blowdown started and hiked up-hill through the brush. After about 40 yards, I picked up the trail again. There are more blowdowns on the way to the summit, although they are not as bad.
Given the overall trail conditions, I would not recommend this hike for a novice or intermediate hiker. The blowdown on the Mount Catherine Trail is the worst I've ever seen (and I have 15+ years hiking experience and over 400 hikes under my belt). If you do attempt this hike, always keep the ridgeline to to the west in visual sight, and, if you lose the trail, scramble down-hill on the west side of the mountain to the road.