I've been working on losing weight (down 35 right now!) and also exercising more. My left knee gives me issues some when running/jogging (ACL replacement a few years ago, then injured my meniscus last October. It doesn't bother me too bad right now but the pounding of running, even when I make sure and run easy on it, still make it quite sore). Anyway, looking at getting into biking and looking at doing some MTB. My in-laws have a house at Shangri-la on ouachita and its less than a half mile from the Ouachita Vista Trail. I have a mountain bike I bought in college so its 15 years old, but I bet it doesn't have 5 hours on it. My roommate was BIG into MTB and had like a $5k bike and he recommended this one to me at the time as a great starter bike. Its a Giant Rincon SE. Anyway is that sufficient to start with? I replaced the tubes in it over the weekend and checked it out and cleaned it up. Seems to ride well around my house and stuff. Are newer MTBs really worth it compared to what I have? Thanks for the help/tips from any mountain bikers out there!