Thousands of runners have started to descend upon Houston. We found them picking up their bibs and information packets at the GRB on Friday.
For the tenth year in a row, the marathon is sold out. Twenty-five thousand runners will compete there. And they'll be cheered on by an expected crowd of 250,000 people.
This year's race is a little different as they've had to move the course around light rail construction. The course is expected to be flatter and maybe even a little faster than years past.
This is Houston's first marathon since the Boston bombings. Race officials stress that everything possible is being done to ensure the safety of all involved.
"Plans are in place to protect the course, not just start and finish," said Chevron Houston Marathon executive director Wade Moorehead. "The entire course is under close supervision from all of our public agencies."
The race is expected to inject over $51 million into the economy here. And charities will benefit too. Last year, the "run for a reason" program raised $2.2 million for non-profits.
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