WACO, Texas (KWTX) Participants from around the country ran in the Race Revolutions Cameron Park Trail Run Sunday morning.
A 5, 10.5, and 21K competitions were part of the annual event which is part of a larger series.
Some competitors were attempting to qualify for nationals, in what even experienced runners say is a difficult course.
"It's pretty tough here," says organizer Joel Grimmett.
"We get a lot of people from out of state here and they run...They like it a lot, it's really popular and been a good race for us," says Grimmett.
Officials say this year's trail was altered slightly from years past due to flooding in the nearby Brazos river.