Well spotted! Yes, that's a great hill for training although it can be a little uncomfortable to share with vehicles. Most of it is closed in winter so if there isn't much snow, it's a fun place to run hills.
There is a ride we do from CHC into the subdivision west of Inglewood and onto trails partway up the escarpment. We come out onto the Grange Rd. (you may have seen the gated driveway for the gravel pit halfway up on the south side) and ride uphill and turn north on Creditview, then take trails from the dead end to Belfountain for a snack. Parts of it feel like an AR ATV trail, even though I've never seen ATVs there.
A few years ago, I did some hill tests around here. I believe the MacLaren Side Trail is closed now, unfortunately. I'm always looking for new places and I think I may have found a gem near Kilgorie last weekend!