Eugene running coach Joe Henderson approached his 75th birthday this month with what seemed like a perfect plan: he'd do the Newport Marathon on June 3 and celebrate the achievement on his birthdate the following day. His goal was to walk the marathon, traveling the 26.2 mile route within the event’s seven-hour time limit. It would be his first all-walk marathon and another step in a long transition from runner to walker. But you know what they say about plans. In late April,