When is Monster Mash?

Monster Mash takes place on Oct 31, 2026. That's in 5 months.

Where is Monster Mash located?

Monster Mash is held in Houston, Texas, United States.

What distances are available at Monster Mash?

Monster Mash offers the following distances: 10K, 5K, 1K.

How do I register for Monster Mash?

You can register for Monster Mash through the official registration page.

What is the typical weather for Monster Mash?

Based on historical data, you can expect temperatures between 58°F and 78°F on race day. There's approximately a 12% chance of precipitation.

Monster Mash (1K-10K) - Oct 31, 2026 | Houston, TX

Get ready to unleash your inner monster at the Karbach Brewing Monster Mash Run, Houston's ultimate Halloween-themed race on Saturday, October 31, 2026. This spooktacular event invites runners of all ages and abilities to hit the streets of Houston, TX, in their most creative costumes, offering distances of 10K, 5K, and a Kids/Family 1K. Enjoy typical race day conditions with highs around 78F and lows near 58F, and only a 12% chance of precipitation, making for ideal running weather.

The Monster Mash course features a flat road surface, winding through the city streets, with the 10K covering two loops and the 5K a single loop, culminating back at the festive Karbach Brewing Co.. Participants can expect a lively urban backdrop, energetic atmosphere, and a full-blown party on the move. Aid stations will be available along the route, providing essential hydration, and medical assistance and toilets are also provided for runner support. Free parking is conveniently located at Karbach Brewing Co..

Renowned as the city's best Halloween-themed run and after-party, the Monster Mash is a highlight of the local racing calendar and serves as the seventh race in the popular Houston Holiday Series. Organized by the Houston Running Co., the event promises an unforgettable experience blending competition, community, and festive fun, concluding with a vibrant post-race celebration at Karbach Brewing Co.. Whether you're chasing a personal best or simply want to revel in the holiday spirit, the Monster Mash offers a unique and spirited running celebration.