Take Sheldon road just north of the new 90 and turn right on Van Road. It's just a little side street so you can miss it pretty easy. Then just take Van all the way to the end it's well over a mile and you go back under 90. They do have a website but it doesn't look like the guys are computer people and it really doesn't give much info. There was a short thread here with some pics
http://www.texasguntalk.com/forums/texas-gun-ranges/51878-van-road-gun-range-east-houston.html
http://www.texasguntalk.com/forums/texas-gun-ranges/51878-van-road-gun-range-east-houston.html