Spots are still open for those wishing to take part in the run, but for those who just wish to watch thousands of grown ups racing through mud the event will be held at the Orange County Great Park in Irvine.
There will also be tons of earth-friendly merch at the Mud Run expo.
If OC is too far, another run is scheduled for Aug. 21 in LA at the Pasadena Rose Bowl.
The OC Mud Run will be held at between 7 a.m.- 4 p.m. at the Orange County Great Park in Irvine.
-- Lauren Williams