IRA is meant to be ridden in a counter-clockwise direction. There are two rock gardens and a few tricky sections right away, but then it levels out. Once you get near the creek, there is a crossing that leaves IRA and heads into Waterworks/Mason Mill. For the real thrill seeker, there is a section called the highground that can be accessed from IRA near the RR bridge. You will need to cross the creek and get under the trestle, where you will see a switchback going up and away from the trestle. This section has some serious drops, jumps, and climbs. Do not go in there if you are not familiar with extreme trails.