Marengo Firecracker 5K - Underground - Run/Walk

in United States at Marengo Boys and Girls Club

Online registration for this event has closed. Race day registration is available for the same price as late registration. 6-7:45AM Location: Marengo Elementary 177 S 2nd St, Marengo, IN

  • 5K
    T-shirts are not guaranteed after June 28th

    Online registration is closed for this category.

  • Student Group 5K
    (ages 0-18) (groups of 3 or more)

    Online registration is closed for this category.

  • Volunteer
    Thank you for being a part of the "Return to the Underground" and thesecond life to the Margengo Underground 5K. Your involvement as avolunteer is greatly vital to the success of our event! We appreciate eachof you and look forward to seeing you race day. All volunteers will receive a race day t-shirt, race bag, as well as anoption to win a raffle prize.

    Online registration is closed for this category.

  • Donation
    (not an event entry)

    Online registration is closed for this category.

About The Marengo Underground 5K

July 3, 2024
Pre-Race Packet Pickup
Marengo Crawford County Boys and Girls Club - Cafeteria
5:00pm - 8:00pm

July 4, 2024
Race Day Registration and Packet Pickup
Marengo Crawford County Boys and Girls Club - Gymnasium
6:30am - 7:45am

Race Start - Directly in Front of Marengo Elementary / Crawford County Boys and Girls Club
8:00am [Walkers and Strollers need to start at the back of the corral]
[Wave starts will apply if attendance reaches 1,000]

  • Race will begin at the Marengo Boys and Girls Club proceeding down SR 64 passing Marengo Cave on the way to through the underground Marengo Warehouse
  • Race awards will be given to top 3 male and female finishers - Age group awards will be given (10 year increments)
  • T-shirts are only guaranteed to pre-registered participants up to June 28th and are subject to size availability on race day
  • Strollers are restricted by insurance and are at your own risk. There are some uneven portions in the back part of the cave.

Join us for our official race restart! This will be year 7 for the most unique race in Southern Indiana! As underground temperatures year-round are 54 degrees, this will undoubtedly be the coolest July race around.


Parking will be available at the Boys and Girls Club on a first come, first serve basis. Overflow parking will be guided by the parking team once.

Please arrive by 7:30 as Marengo is a small town and logistics are challenging.


The course will start Marengo Boys and Girls Club proceeding down SR 64 passing Marengo Cave. It then heads directly to the underground tour at mile 1 doubling back to finish just outside at the festival. Features include the underground, rolling hills, and scenic small town Indiana charm. By far the coolest both in temperature and in novelty.

The warehouse features several back and forth hairpin turns eventually leading down a corridor of offroad-like but smooth terrain. The entry point is shortly after the 1 mile interval where the indoor portion is right at 2 miles in total. Inside you will find good lighting, good temperature, and fast and flat terrain. A destination race that will offer major relief from the hot summer and a scene like none other.

Awards & Prizes

- Top 3 - Men/Women
- Top 2 - Men/Women per age group

- Age group awards will be given in 10 year increments.
- 0-9, 10-14, 15-19, 20-29, 30-39, 40-49, 50-59, 60+

Race Sponsors

We want to offer sincere thanks to our sponsors this year:
Title Sponsor
- Lucas Oil
- Marengo Warehouse (our course)

Supporting Sponsors
- First Savings Bank
- Marengo Caves
- Crawford County Tourism

Questions and Answers

Q: Is this an actual cave?
A: This is 58 acres of underground warehouse with major roads throughout. It is as cool as a cave without the interior decor to go with it. Marengo Caves entrance IS on the race route, and they are a proud sponsor if you'd like to tour local caves on race day!
Q: Can spectators walk the underground portion to cheer on participants?
A: No, the underground is a secure area and capacity is based on run/walk participants only. The insurance also does not account for spectators inside the venue. However, you can cheer at the entrance/exit.
Q: What is the temperature inside?
A: Temperatures inside are around 54 degrees, the same as local caves. It will feel great on a hot July day.
Q. Where is the course map?
A. Due to the high-security nature of the warehouse, we will only show the outside portion of the course.
Q: Can I get lost in the "cave"?
A: The course will be lit, marked, and monitored. If you follow the cones, markings, and volunteers you will have no problem. If you venture off the course, then you could find yourself in a place you do not want to be so please obey all volunteers and course instructions.

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Registration Form Closed

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