Four years ago, Susan Larsen set an ambitious goal to run a marathon in each of the 50 United States. She completed her 49th state when she crossed the finish line in Pennsylvania’s Danville Marathon in April.

With only one state left to go, Larsen encountered an unexpected roadblock along her path — there were only Sunday marathons in Vermont.

Larsen, a 52-year-old piano teacher from Farr West, Utah, made a commitment that she would only race on Saturdays when she set her cross-country goal in 2008.