MARQUETTE, Iowa (AP) — A 66-year-old eastern Iowa man says only Alaska’s Denali thwarted his efforts to scale the highest peaks in all 50 U.S. states. Don Smalley set himself the challenge to reach the highest point in every state in 2016. The Marquette resident high-pointed in 43 states between 2016 and 2017, including the peak of California’s Mount Whitney 14,495 feet above sea level.

Last summer, he failed in his attempt to summit Denali , the highest peak in North America. The Telegraph Herald reports that Smalley concluded his effort this February by driving to the top of Hawaii’s Mauna Kea, achieving his 49th completed summit. Smalley says he is looking for a new challenge and that he and his wife “have no shortage of things” that they want to do.