I’ve got a couple Rc rock crawlers that I’ve built up from available parts at the local hobbyshop. Basically they are Axial SCX-10 chassis’, axles, and electrics.
The shortcourse racers are a Helion Dominus, 2 ECX, and 1 of those rock crawlers is also a Desert Truck, with the wider Wraith axles. There use to be an RC raceway here in my town, just a few blocks from the house, but there must not have been enough local guys interested, because they only lasted a couple years. So now the closest track is 15 miles away.