How to Train for Your First 50K Ultra-Marathon
Runner's World & Running Times
I'm training for my first 50K ultra-marathon trail run this season. Do you have any tips? How far should I go on long training runs? I've done one full and several half marathons. @seanDameron
Read this on Runner's World & Running Times
Benefits of running for time vs. distance.
Could you run an ultra-marathon? - Telegraph