Hill repeats are a great way to build your riding fitness relatively quickly.
There is not generally a group rollout for this ride. Riders just do the hills at their own pace, starting when they get there.
Hills are ridden at your own pace. The standard workout is 4 repeats of Cadboro Bay Road Hill, 3 repeats of Sinclair Road Hill, and 2 repeats of Mt Tolmie, riding down the backside of Tolmie between repeats. Riders often regroup at the top of Sinclair Road before riding over to Tolmie.
Watch for ice and rough surfaces in winter, especially on the back side of Mt. Tolmie.