Editor’s note: Wendy Cregg filed for Minnesota House District 49B after this interview was conducted. This feature is tied to Grandma’s Marathon’s 50th annual event and does not address her campaign. When Wendy Cregg ran Grandma’s Marathon in 1977, there was no training app, no online training plan and no high-tech race-day gear. The course had water stops, not sports drinks. Cregg said she was later told there were two water stations, around mi…