The Kaiwi Channel is one of the most difficult channels to cross on a paddleboard.
On Sunday, some of the world's top athletes took on the challenge in the 15th annual Molokai to Oahu Paddleboard World Championship.
And for the man you're about to meet - it wasn't about winning, but rather proving the impossible is possible.
Under the afternoon sun a group of people wait for Mark Matheson to arrive at Maunalua Bay.
"I feel like i'm waiting for a child to arrive," says Mark's wife Stacie."you know china walls never seemed so far away until today."
If he arrives Mark will be the last one to finish the 32-mile race from Molokai across the Kaiwi Channel to Oahu.
"Everybody has just been so supportive, you have people who won the race today that are waiting here just for him to come in," says Stacie.
With a time of 9 hours 18 minutes, Mark Matheson finishes the grueling race.
Mark is living proof that it's possible to crush obstacles.
Competitiveness isn't found in the legs or body. It comes from the heart.
Mark is paralyzed from the chest down.
He's been like that since 1993 after falling off a balcony at a hotel on Kauai.
He competed in this race last year, but didn't finish.
This time around, it's a different story.
Even without his legs, Mark still stands tall.
"This was awesome great experience great crew," he says.
And despite coming almost five hours behind the first place finisher Mark has a lot to be proud of.
"Maybe it'll inspire someone else to get out there and push the boundaries and know no limits," says his wife.
"I'm 50, fat, balding and in a wheelchair, and I just did the Molokai Channel crossing, so if that can inspire people that would be great," he says.
