03-19-2009, 02:28 PM
If the pits included with the Walthers roundhouse are correct, I'd say about 4'. I built an outdoor pit and used stairs by, umm, can't think of who right now. Maybe Pikestuff? Anyway, I just used sheet styrene cut to match the steps and I just measured the depth, 4', close to the Walthers. A couple pics, ground cover to come soon.
