Terrace Mountain is a great peak. From our approach (E/SE), we were able to walk along one of the central "terrace" shelves from a stretch of the route. Some scrambling and steep duff near the summit, too. I skipped the Dip Top and Lynch climbs, due to not feeling well... but seeing Jade Lake was worth the trip.
We did the south side approach from Marmot Lake. 3 peaks in 2 days. Great trip!
See the trip report.
You really gotta want this one. No trail comes close to it.