I ran castle last week and it has the usual wood. Put in at Hall drive. There is the usual river wide tree that is easy to duck on the right. Both major sections of rapids have the usual wood. If you haven't run it before you should take a look because it is good to know the line going in. After the major rapids there is a tree that can be boofed on the right at mid to high flow. Towards the end there is a tree that has been there for a long time. The line is far left and be sure to duck. At 450CFS it is a tight fit but I have heard of people making it under at higher flows.
When I ran it last week it was about 450CFS using this gauge
American Whitewater - Gauge - CASTLE CREEK AT ASPEN, CO