I ride with my kids of 12 and 14. Iâ€™ve explained to them that when they hear a rider approaching from the rear that they should pick a spot on the trail to pull over to either side far enough for the rider who is catching them up to ride past. The key is in the timing, pull over early enough that the catcher is not right on your wheel before you decide to yield. And when across a hill remember to stop and put your foot down on the uphill side.I recently introduced my girlfriend to mountain biking, and she's loved it but for one thing. Riders (usually experienced riders) who approach at high speeds, follow very close behind, and pass without asking or even calling out a warning have been a major problem for her, and in a couple instances causing her to go into the bushes. I realize those behaviors are pretty normal when you're riding with other experienced bikers but I don't think most people realize how it affects people who are new to the sport. I've been riding behind her to physically block people from getting too close but that can only do so much, especially on 2-way trails. My question is, what can we do as individuals or as a community to help new people be as comfortable as possible on the trails, and not let experienced riders be seen as a threat by new riders, so we can all enjoy this sport?