I assume you mean the beacon bridge. You go west on 84 until exit 5 (maybrook/Montgomery) and once you descend the off ramp there will be a light. At this light make a left onto 208 proceeding to go under 2 bridges (84 east and west) and through two more traffic lights. Once you go through the last traffic light there will be a Subway on your left and a Deli/Hess on your right. Continue up 208 about a quarter mile until you see a bar and a dirt parking lot on your left. Everyone on Saturdays and Sundays parks in this bar's dirt lot (you will find it w/o a problem on these days it can get mobbed). The entrance to MTA is a long section of whoops on the other side of the RR tracks followed by numerous other trails. In some spots the whoops in MTA go on for 4-5 miles straight! There is a bowl in the ground to ride in, horse shoes, jumps, and lots and lots and lots of trails! When you are parked in the bar’s lot there is a small trail leading out the back of the bar's lot across a private driveway/road (for yellow freight trucking); cross the road and proceed over onto the dirt path. You will notice a raised area where you can cross the tracks easy and get access to the whoop stretch; once you cross the tracks to get to the bowl you want to go right and follow the whoops down pass an old train station (on your left) and then make the next left shortly coming up there after. You then go down this small trail and the Bowl of MTA is right there. MTA is the “hub” for most of the best riding spots in Orange County (such as tetz); you can pretty much get anywhere from there. I have been riding there for 5-6 years and still have not been down all the trails it has to offer!! ;D