Almost a Pasadena Pacer

Saturday, I will attempt to hang with a group of walkers. I'm not sure how many miles they plan on doing, but I'm gone at the first sign of knee pain. The walkers are associated with the Pasadena Pacers, a local running club who, most importantly, don't charge any dues. I'm keen to see how my knee reacts to, say, three miles at a modest pace. Not much in the grand scheme of marathons and ultramarathons, but a worthy start. And free. I mentioned that?