Here is a place I have discovered in Taytay
Not sure if this is already known to local riders but the place is a private land but I was told by the security guard manning the place that it is ok to go to there with your bike.
I think this will be a great venue for competition as it is very accessible from Manila and since the place is compact (small area) spectators would have a better view of the race as it happens. And since it is secured, a 24 hour event would also be safe. Tracks are existing and no settlement inside so it would be easier to coordinate the route.
Its a small place, maybe about 20 kms or less of tracks only (but better than a Pestano or other smaller artificial tracks) and is located near Ortigas so it’s good for an early weekday dose of an adrenaline rush activity.