The Tucson Cold Cap: Randy Accetta, president of the Southern Arizona Roadrunners and a 1996 Olympic Trials marathoner, keeps his head cool in the extreme heat of Tucson with his "cold cap." "I'll soak a baseball cap in water and put it in the fridge for at least 30 minutes or overnight before a morning run," he says. "An old baseball cap retains the moisture longer than the new technical hats."
The Badwater Bandanna: For years, Denise Jones puzzled over the best way to keep the competitors in the Badwater Ultramarathon cool. Finally, Jones—considered the "dean" of Badwater aid-station volunteers—came up with the answer: Lay a bandanna out in a diamond shape. Place a row of ice cubes in a horizontal line, just below one tip of the bandanna. Then roll it up "like a burrito," and tie it around your neck. "We've found that this is the best way to keep runners cool," she says. "It feels wonderful."