Sat, Oct 31, 2026

Monster Mash

Houston, TX

Registration openAnnual since at least 2021
5K10K1K
Register · From $55

About the Monster Mash

The Monster Mash is a Halloween costume run through Houston streets, part of a recurring holiday race series. The crowd shows up dressed for it, so expect plenty of elaborate getups at the start line. Karbach Brewing hosts the after-party, which is the obvious draw once you cross the finish.

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Distances & Start Times

GUIDE - 5K10/31/2026 07:30Free
GUIDE - 10K10/31/2026 07:30Free
5K10/31/2026 07:30$55
10K10/31/2026 07:30$65
1K10/31/2026 09:30$30
Virtual 5K10/31/2026 09:15$55
Virtual 10K10/31/2026 09:15$65

Going for a Time?

Set a goal and get a pace band: every mile split on a card sized for your phone lock screen, so race morning needs no math.

Not sure what to aim for? The 5K pace chart lists the pace for every finish time.

Plan Your Trip

Where to Stay

Traveling for this race? The map shows hotels and rentals in and around Houston — pan or zoom to compare what's nearby.

The map is provided by Stay22. If you book through it, RunSesh may earn a commission at no extra cost to you — it never affects the races we list.

Common Questions About the Monster Mash

Where can I train for the Monster Mash?

Join a local run club. Houston Striders, In Flight Running, Houston Harriers and others in Houston welcome runners of all paces, and a weekly group run is the most reliable way to hold a training block together.

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