If you wouldn't dream of running without listening to music, then you'll be happy to know that there are a bunch of upcoming marathons that allow headphone use.
Keep in mind that some marathons ban the use of headphones and portable MP3 players such as iPods. They're banned for safety reasons — you know, because listening to Queen's "We Will Rock You" just might send your body into uncontrollable speeds, and you may run into the banana and water stand. If you're looking to run 26.2 miles with your headphones, here's a list marathons compiled by Runner's World where you can crank up the tunes and run!
To see the rest of the list
Big-D Texas Marathon (Texas): April 5
OC Marathon (California): May 3
Green Bay Marathon (Wisconsin): May 17
Mayor's Midnight Sun Marathon (Anchorage): June 20
San Francisco Marathon (California): July 26
Lake Tahoe Marathon (California): Sept. 25-27
Portland Marathon (Oregon): Oct. 4
Des Moines Marathon (Iowa): Oct. 18
Richmond Marathon (Virginia): Nov. 14
Tucson Marathon (Arizona): Dec. 13
Dallas White Rock Marathon (Texas): Dec. 13
Miami Marathon (Florida): Jan. 24, 2010