Rocky Mountain Dirt Riders

I've been trying to find a place for my 10 year old son and I to go riding (dirt bike and side by side) while at our summer lake cabin but am having trouble finding an area near Carvel (closer to us) or Alberta Beach. I've been able to find a little information for a place called Stanger Hills but it is EXTREMELY outdated, mentions a strict 25 KM an hour trail speed limit and indicates you have to be a member to go there. While we are not racing around going top speed by any means, 25 km per hour seems INCREDIBLY slow. As we would be doing day trips as well, I would prefer not to have to drive hours to get there. We line in Calgary so I am used to hitting the MacLean Creek staging area in about 35 min. For all those who live in the area, where the heck do you all go?