I backpacked a piece of this trail anti-clockwise to Big Elbow back country campground and back out the same route, 20k in all. Very little elevation gain, wide open fire road, excellent views all the way of the surrounding mountains. There are 4 major washouts from the 2013 flood, 2 to be wary of. The first is the trailhead, it's gone from its original location at the Trailhead parking area. The trail has to be accessed via the suspension bridge a little further up. The second is at about 8km in, the trail is completely gone and a little skirmish up the river bank is required to get back to the trail. Temps in the high 20's in and out the next day. Camp ground had wood, an axe, toilets, bear lockups for your gear and great views. This was a training hike for me carrying 30lbs so I aimed for little elevation and short distance. My preference is elevated views hence only 3 stars
Me and a couple friends hiked this loop over 3 days, with camping planned one night at Mt Romulus backcountry campsite, and the other at Mt Tombstone backcountry campsite, and had a great time. The only concern for bikers is the LONG high pass between the two campsites (NW and SW corners of the loop), but otherwise is a good hike. We went in July, and woke up to snow the first morning, which quickly melted. The paths are good and worn for bikers and hikers alike, don't recall any real complications.