If you're gearing up to cheer them on this Sunday, check out our list of the best places to watch the marathon action.
Crystal: The marathoner who overcame paralysis
Why We Run: 'My tragedy became my blessing'
The Samans: The family who runs together stays together
The family who runs together stays together
Leslie: From volunteer to runner on her 40th birthday
Why We Run: Leslie's first marathon
Charlie: An HPD officer on a mission
Why We Run: HPD officer runs in full uniform
Letesia: 'I want to feel free'
Why We Run: 'I run to feel free'
Zane: Even the youngest of runners gets in on the fun
Why We Run: Meet Zane Hawthorne
Jim: 83-year-old adds to his medal collection
Why We Run: Meet Jim
Chad: Running for the Texas Children's Hospital NICU
Why We Run: Texas Children's NICU
Meet the runners of Memorial Park
Why We Run: The faces of Memorial Park
The Houston Marathon Foundation: Making running accessible for everybody
Why We Run: Houston Marathon Foundation
Chevron gives back to the Bayou City
Why We Run: Chevron in the community
ABB supports the Houston running community
Why We Run: ABB 5K
Stay with ABC13.com for complete coverage of the Chevron Houston Marathon and Aramco Houston Half Marathon, and tune to ABC13 on Sunday, January 15 for live coverage on race day.