Is this part of a larger race series?

Yes, this event is the seventh race out of nine in the Houston Holiday Series.

Should I wear a costume?

Yes, runners are encouraged to participate in full costume to embrace the Halloween theme.

All races

3 weeks out

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All races

3 weeks out

Monster Mash

Saturday, October 31, 2026Houston, TX1K – 10K

Get ready for the Karbach Brewing Monster Mash Run, the ultimate Halloween-themed race in Houston. This festive event invites runners to hit the city streets in their best costumes for a spooky and spirited experience. As the seventh race in the nine-part Houston Holiday Series, it is a staple for local runners looking to celebrate the season. Beyond the run, participants can look forward to an incredible after-party that keeps the energy high. It is the perfect way to combine fitness with holiday fun in the heart of the city.