Welcome to Northern Arizona Trail Runners Association (NATRA LLC). Founded in fall 2001, NATRA’s mission is to promote trail running in Northern Arizona to folks of all abilities. We organize free group runs of 5 to 8 miles at various trails on Saturday mornings whether there is rain, snow or shine! We have never missed a Saturday run (except in favor of local trail races). If you are new to running or a seasoned veteran, come join us off road and discover the incredible forest trails of Northern Arizona. All you have to do is show up!