24/12 Hours of

Iron Maiden

pb XTERRA

July 5, 2025

9AM CST

Whether you want a killer 24-hour solo ride, rip it up on course on a team of buddies, or chill on a Just Having Fun team, the 24/12 Hours of Iron Maiden has something for everyone! A favorite of Chainbuster staff, we look forward to a weekend of fun at Tannehill every summer. We pit right where we camp and have the entire Farley Field to ourselves!! Grab some friends, pack your camping gear and make it a weekend of mountain biking!

VENUE

Tannehill Ironworks State Park

Farley Field | Trade Days Area

12632 Confederate Pkwy

McCalla, AL 35111

$5 per person daily use fee. PLEASE bring exact change in cash if you are arriving on Saturday morning. The gate will open at 6AM. You will be given a wristband for the weekend so you may come and go as needed.

Tannehill State Park website tannehillstatepark.org/

COURSE INFO

CAMPING

The first campground you see when you enter the park is RV camping with full hookups, but that’s not where we are holding the race. Continue down the road and follow the signs for Farley Field/Trade Days. You’ll go over a wooden bridge and in front of you opens the vast expanse of Farley Field. This is our home for the weekend! (ALL RVs/CAMPERS TAKE LOWER ROAD. DO NOT CROSS THE METAL BRIDGE.)

Farley Field has water and electric for RV camping & there is a dump station within the park. There’s also a primitive camping option.

Camping is first-come first serve and no reservations are available. This is a PARK POLICY.

All racers staying overnight at Farley Field must register in the Temporary Campground Store (located in The Creamery.) No exceptions.

Full Hook-up Sites: $30 per night per family of four and $3 for each additional person.

Power and Water Sites: $25 per night for up to 4 people. $3 for each additional person.

Primitive camping is $20 per site up to four people. Primitive is no power or water.

All campers in Farley Field have access to the bathhouse.

Tannehill State Park website: tannehillstatepark.org/

2025 Tentative Weekend Schedule

FRIDAY

3:00 pm: Course will be marked for pre-ride

4:00pm: ONSITE REGISTRATION AND EARLY PACKET PICKUP OPEN

6:00pm: ONSITE REGISTRATION AND EARLY PACKET PICKUP CLOSED

10:00 pm: QUIET HOURS BEGIN

SATURDAY

6:00am: Tannehill Gate Open

6:15am: Packet Pick Up / Onsite Registration Open

8:00 am: Packet Pick Up / Onsite Registration Closed

8:30 am: RACER MEETING AT SHED 1

Optional Prayer at the Podium

9:00 am: 24 HOUR RACE BEGINS

9:15 am: 12 HOUR RACE BEGINS

6:00 pm: LIGHTS REQUIRED FOR ALL RACERS

9:15 pm: 12 HOUR RACE ENDS

9:30 pm: 12 HOUR AWARDS

11:00 pm: QUIET HOURS BEGIN

SUNDAY

9:00 am: 24 HOUR RACE ENDS 

9:15 am: 24 HOUR AWARDS

Frequently Asked Questions about the 24 Hours of Iron Maiden

  • The race fees listed are for the whole team (or if only a solo, for that one racer.)

  • Each racer will receive their own commentative race plate for the 24Hours of Iron Maiden. Previously used plates can be tossed in the trash or placed on your bike garage wall.

  • All Chainbuster races operate on local time!

    The 24 Hour races starts at 9AM and ends at 9AM Sunday.

    The 12 Hour race starts at 9:15AM and ends at 9:15PM.

  • A late fee of $10 will be applied after 11:59 PM on Increase/Decrease Day, which is on Sunday, two weeks before the event.

    Increase/Decrease Day is also the deadline for reserving your custom race tee shirt!

    Online registration closes at 11:59PM EST on Wednesday night before the event.

  • When signing up for a team at Iron Maiden, you will also add in team member names and emails. This allows your teammate to fill out the waiver, add emergency contact info and reserve their race tee shirt!

  • Friday 4PM-6PM

    Saturday 6:30AM-8AM


    Early Check-In and Packet Pick-Up is available during pre-ride on Friday afternoon from 4PM-6PM at the venue.

    Please let us know if you check in and then decide not to race.

  • Our races will carry a registration limit based on local guidelines and restrictions.

    Race day registration will not be available at every race.

    When race day registration is available, a $20 late fee is applied.

    Additionally, there is no guarantee of a tee shirt with late or Race Day Registration.

    Please check our website and social media to determine if a race is sold out and/or if Race Day registration is available.

  • For those new to the Chainbuster family, we utilize an RFID chip timing system to capture your lap times. On your race plate, you have two silver timing chips that are encoded with your plate number. When you pass through timing, mats on the ground will read those chips and record your time.

    Results will be printed every 30-45 minutes and will be posted in the Specialized tents where you checked in.

    When cell service is available , we will also upload results to our website. A QR code will be available at the Specialized Results tent.

  • All teams are expected to transition in the Hammer Nutrition Teams Transition Area which will usually be approximately 300 feet past the timing tent near the check-in area. (Look for the Transition flag!)

    Coolers of water and Hammer Nutrition products will be available for all racers. Please assist us by keeping the pits and trails clean.

  • If a rider in a team category has a mechanical or has a wreck preventing them from finishing the lap, the rider can call in to their team to send a replacement rider on course.

    The replacement rider must check in at the timing tent before entering the race course. Once the replacement rider enters the course, the original racers lap is canceled and his/her time on course will be added to the lap time of the replacement rider.

    All laps must be completed before the 12 hour or 24 hour race clock expires.

  • Unless otherwise posted, races will be held as scheduled.


    Our amazing friend, fellow racer and staff meteorologist at AMB Weather keeps us up-to-date on all things weather starting on Sunday night before the race. His website holds the latest information for our race.


    https://ambweather.com/cbr-racedayfcst/

    For more information on our weather policy, please see the ENDURANCE RULES page.


    On the occasion that a race is affected by adverse weather conditions, we will do everything possible to work with land management to reschedule the race for a future date, and your registration will be automatically transferred to the new date. If a reschedule is not possible OR if you are unable to attend the rescheduled date, we will transfer your registration to another race of your choice.

    Refunds are not available


    If a race is canceled due to inclement weather, the points for that race will be made up at the series finale.

    If you were registered for a race that was canceled due to inclement weather, you must register for the series finale and complete a minimum of 1 lap in the series finale to receive points for the canceled race.

    The points for the series finale will be awarded using our regular points scoring system. We will then take your score from the series finale and double it to account for the canceled race.

  • Our amazing photographers, Kelly and Kevin of Dashing Images will be onsite to document our day! Pictures are usually posted by Sunday evening. Watch social media and our results page for the link to the photographs. Please say “thank you” by purchasing your memories. However, all pictures are property of Dashing Images until you purchase them.

    Please do not use unpurchased pictures (watermarked images) on social media.

  • If you are not feeling well, we ask that you please stay home.

    Email us prior to race start and then submit a transfer request.

    We will gladly transfer your race registration to a future Chainbuster-hosted race in the same calendar year.

  • If you have a family emergency or illness after online registration closes, please email us prior to race start and then submit a transfer request. We will gladly transfer your race registration to a future Chainbuster race within the same calendar year. Click here to request a transfer

  • There will be no refunds once registration is processed. However, we will work diligently to transfer you to another race in the same calendar year in the event of illness or emergency.