Tags: 10k, 25k, 50k, 5k, best, best shoe, dean karnazes, distancia, ethan newberry, fastest, forefoot, ginger runner, gingerrunner.com, good race shoe, gravitas, half marathon, hydration, light shoe, lightest, marathon, midfoot, natural running, newton, perfect mile, race, review, running shoes, saucony kinvara, trail running, ultramarathon, worst