A wonderful hike. We completed it in 6 hours at a leisurely pace in rainy weather. Went up via Nickerson Ledge Trail then Carter Ledge Trail which leads to a large granite opening with views and blueberries (in late July). It’s a wonderful spot for lunch. The Middle Sister Trail was along an open granite ridge with great views to both sides. We didn’t do the spur to the summit of Mt Chocorua but descended down Piper Trail. In the rain it was very slippery on the open granite faces. We had a few falls. The top half of this hike also involves scrambling up and down steep rock strewn narrow trails which are streams in the rain. The lower section of Piper Trail crosses a stream which is a nice area to hangout.