The Amazing Race Wiki

Mark Corey Yturralde and William "Bill" Kahler are a team of Best Friends on The Amazing Race 13.

Although not as physically fit as their competitors, Mark & Bill were able to make use of their navigational abilities and proficiency in mental tasks to race near the front of the pack for the first two legs. However, they made a mistake in the third leg when they took a taxi instead of going on foot to the Detour as their clue had specified, thereby incurring a time penalty. They were far enough ahead that they could have survived this, but Mark later struggled with the physical Roadblock due to his altitude sickness, dropping them several places and causing them to reach the Pit Stop ahead of just Kelly & Christy. Their subsequent penalty for their infraction at the Detour then caused them to drop to last, finishing in 9th place.


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These comic book aficionados are determined to be the most strategic team ever to compete in the Race. Mark and Bill, friends for over 23 years, first met at a science fiction club and have been bonding over their love for comics and games ever since. Mark says that he "wears geek like a badge of honor."

Mark describes himself as outgoing, funny and smart. He is willing to go anywhere and isn't afraid of adventure. His last vacation was to Vanuatu in the South Pacific where he climbed a volcano.

Bill is the opposite of Mark—he describes himself as cautious, easygoing, goofy, yet competitive. When asked how the Race could change their friendship, Bill says that the Race might present them with some bad situations, but in the end, they'll finish with a deeper respect for one another.

These masterminds are ready to see what they are made of and are convinced that they can be one step ahead of the competition if they play their cards right.[1]

The Amazing Race 13[]

Race History[]

Mark & Bill's Race History
Episode Leg Destination(s) Detour Choice
Placement Notes
1 1 United States → Brazil Hard Way Up / Soft Way Down No Roadblock 4 of 11
2 2 Brazil Beach It / Docket Bill 2 of 10
3 3 Brazil → Bolivia Musical March / Bumpy Ride Mark 9 of 9 [1]
Average 5.00
     The team finished in first place
     The team finished in last place and was eliminated from the race
     The team finished in last place in a non-elimination leg
     The team that won The Amazing Race
     The team that crossed the Finish Line second
     The team that crossed the Finish Line third
The team used the Fast Forward pass
The team used the U-Turn
Recipient of the U-Turn

1: Mark & Bill initially arrived 8th, but were issued a 30-minute penalty for taking a taxi instead of going on foot to the Bumpy Ride Detour. During this time, Kelly & Christy – the only team trailing them at that point – were able to check in, and Mark & Bill were eliminated before the 30 minutes elapsed.



  • Mark & Bill had been applying for The Amazing Race since the third season.[3]
  • First team to be eliminated in Bolivia.
  • Mark & Bill are the only all-male team to be eliminated in The Amazing Race 13.
  • featured them in a gallery celebrating 'National Best Friend Day' in 2015.[4]

External links[]


  • Oscar Dahl at BuddyTV (10/13/2008): "Mark and Bill, from The Amazing Race 13"
  • John Bracchitta at Reality TV World (10/13/2008): "Exclusive: Mark Yturralde, Bill Hahler talk about The Amazing Race"
  • Teeuwynn Woodruff at RealityNewsOnline (10/20/2008): "I Can't Conceive of Any Person Who Could Come Back and Be the Exact Same Person"
  • Reyma Buan-Deveza at (10/21/2008): "The Adventures of Mark and Bill: A lifetime's memories of Amazing Race"

Social Media Profiles[]


The Amazing Race 13 Teams
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S13 AjaTy
 Andrew & Dan
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 Anita & Arthur
Married Beekeepers
S13 AnitaArthur
 Kelly & Christy
S13 KellyChristy
 Ken & Tina
S13 KenTina
 Marisa & Brooke
Southern Belles
S13 MarisaBrooke
 Mark & Bill
Best Friends
S13 MarkBill
 Nick & Starr
S13 NickStarr
 Terence & Sarah
Newly Dating
S13 TerenceSarah
 Toni & Dallas
S13 ToniDallas