I much enjoyed the article about Dean Karnazes [“One step at a time,” June 2022]. I ran the North Face Endurance Challenge ultramarathon with Dean in Wisconsin in 2011.

At the end of the race, I asked him to share with me the secret of his amazing abilities and endurance. He looked left, then right, then leaned toward me and said in a conspiratorial tone: “You need to pick the right parents!” My response? “Oops, too late for that!”

Michael R. Davis, Las Cruces, New Mexico

Reading about Dean Karnazes reminds me of the time I walked 55 miles around Lake Washington. My family and friends couldn’t i*magine why I would do such a thing. Now I understand how they felt. Run 100 miles? Wow, I can’t imagine that.

David Kim, Medina, Washington