There is a big jogging track on the other side of the subway (next to RiverBay) near the HDB blocks in Jalan Tenteram/Jalan Bahagia. Last time I used to live there in Jalan Bahagia, got people jogging even at 3 AM at night!
BTW I'm also RiverBay owner. I keep following the updates here and drive past it every morning on the way to work.