An ultimate destination for many runners, next Sunday’s San Francisco Marathon is a stop along the journey for one ultra-couple. Devon Crosby-Helms has her sights set on September’s 100-kilometer World Championships in the Netherlands. “This is a warmup,” Crosby-Helms said from the Cole Valley flat she shares with fellow endurance runner and boyfriend Nathan Yanko. “Running a marathon before a 100K is a good test of fitness.” Read More