1991 - Ran a benefit run for Habitat for Humanity titled Shore to Shore in 104. It consisted of a marathon a day, 6 days a week for 15 weeks, which got him from San Francisco to DC in 104 days. It took 50,000+ miles of both training and competitive miles. For his efforts he was rewarded with a personal audience with President Jimmy Carter.
1993 – Dunn ran 104 marathons in a year, breaking a world record titled 93 in '93.
1996 – Ran the Boston Marathon course each morning for 25 days prior to the 100th running of the Boston Marathon.
1997 – Did the LA Marathon for 15 days straight prior to the 15th anniversary of the Los Angeles Marathon.
1998 – Again, ran 16 days in a row for the LA Marathon before running the race for its 16th anniversary.
1998 – For 28 days, Dunn did the original circuit for the NY Marathons 29th anniversary before running the marathon the day of.:
200 in 2000 – Upping the ante, Dunn set out with a goal to run 200 marathons in 2000. His fastest time completed was the HOPS Marathon by Tampa Bay in 4:05:30. While he fell short of his 200 marathon goal, Dunn still completed 186 marathons at age 54.
2006 – Dunn ran 60 miles on his 60th birthday, raising money for a local middle school.
2007 – Dunn was awarded the Special Achievement Award from South Dakota's Black Hills, Badlands & Lakes Association for his creation of the Deadwood Mickelson Trail Marathon and Lean Horse Ultra Marathons, bringing national acclaim and visiting athleticism to run the Mickelson Trail of the Black Hills.
2011 – Dunn ran 65 miles on his 65th birthday.
2016 – Dunn ran 70K in honor of his 70th birthday on the day of the Lean Horse Ultra Marathon.
After the 200 in 2000 project's completion, Dunn directed his passion for running into a new arena and brought four events to the Black Hills of South Dakota.
He began in 2002 with the Deadwood Mickelson Trail Marathon. The entire course is run on the George Mickelson Trail and reviews declare it some of the most beautiful scenery to run in.
Dunn followed this up with the Lean Horse Ultra Marathon, also along the Mickelson Trail, which saw its first race in 2005.
In 2010, Dunn and his business partner, Emily Wheeler, added Run Crazy Horse to their growing portfolio of events. Dunn would eventually sell these races to Wheeler, assured they would be in good hands.
The Black Hills 100 Ultra Marathon, created by Ryan Phillips and Chris Stores, two of Dunn's mentees, is the latest event to have his influence.
America's Marathon Man continues to advocate for the legalization of cannabis and how it may positively impact veterans and aging Baby Boomers. Dunn believes in the potential of medicinal cannabis to help treat conditions such PTSD, arthritis, and more.
Dunn also promotes the use of cannabis for athletes, believing the stigma historically attached to cannabis users is unfounded. He knows from personal experience that CBD, in particular, is vital in relieving both mental stress and physical pain after training and competitive events.
"Runner's High" by Josiah Hesse
Married at 2nd Annual DISNEY WORLD MARATHON, Live on NBC TODAY