Saturday, Mar 9, 2024

Pi Day River Rotation

8th and Oak

Lawrence, KS 42.42 Miler, 29.35 Miler, Marathon, 16.24 Miler, 1/2 Marathon, Pi Miler

This Event Took Place Sat. Mar 9, 2024


Trail run on a smooth, fast course with a few hills sprinkled in for fun.

The Pi Miler, starting at 7:30 am, is 2 loops of different distances, totaling 3.14 miles (just over a 5K).

The River Rotation Half Marathon, starting at 9 am, is a 13.14 mile three-loop course, alternating between counterclockwise and clockwise directions.

The Pi Day River Rotation Full Marathon will start at 8:30 am, runners will take a short lap, and 5 longer loops bringing you to 26.21 miles.

The Pi Slam is the original combo race for the Pi Day Races for those wanting to add a little more distance (and race swag) to their day. It is a combination of the Pi Miler and the Pi Day River Rotation Half Marathon. The Pi Slam will begin at 7:30 am and follow the course for the Pi Miler, and will begin again at 9:00 am with the Pi Day River Rotation Half Marathoners, following the course for that race.

The Ultra Pi Slam is for those wanting to add even more mileage. It combines the Pi Miler and the Pi Day River Rotation Marathon. The Ultra Pi Slam will begin at 7:30 am and follow the course for the Pi Miler. They will then toe-up again at the starting line at 8:30 am with the Pi Day River Rotation Marathoners and follow the course.

For those who can't get enough, or want to try out ALL the distances, The Answer to Everything is for you. The Answer to Everything (42s) will begin at 7:30 am with the Pi Milers and follow the course for the Pi Miler. They will then line up again at the starting line at 8:30 am for the Pi Day River Rotation Marathon. When 42s complete the marathon, they will check in with one of the RDs, where we will line you up at the starting line for your own personalized start time to begin the Pi Day River Rotation Half Marathon.

For all distances, there will be a single aid station located at the trailhead and an aid station at the finish line. Runners in the marathon and half-marathon will pass the aid station at 5-mile intervals.

Drop bags can be left at both aid stations.
Water, Tailwind, Honey Stinger products, fruit, and other items will be available at the aid station.

After the race, enjoy some homemade pie at the finish line with your custom-distance finisher's fork!

Timer Guys will return with chip timing.

Start Time

The Pi-Miler, Pi Slam, Ultra Pi Slam, and Answer to Everything will begin at 7:30am.

The 1/2 Marathon will begin at 9:00am.

The Marathon will begin at 8:30am.
Cut off for all races is 6pm.

Packet Pickup

Beat the race day check-in surge! Pre-race day packet pickup will be Friday, March 8th at Ad Astra (835 Massachusetts St, Lawrence, KS) from 12:30 to 6 pm.

You can also register and pick your packet up starting at 6:30 am at the race site (8th and Oak) on March 9th.

Having your Pi

The Pi Slam (16.24 miles) is an option for registration. Runners of the Pi Slam will run the Pi Miler and the Pi Day River Rotation Half Marathon.

The Ultra Pi Slam (29.35 miles) is another option for registration. Runners of the Ultra Pi Slam will run the Pi Miler and the Pi Day River Rotation Full Marathon.

For those feeling like they have the time, there is also the Answer To Everything (aka 42). The runners of 42 will run the Pi Miler, Pi Day River Rotation Half Marathon, and the Pi Day River Rotation Full Marathon, (42.42 miles).

Lawrence Trail Hawk Discount

Dues paying members of the Lawrence Trail Hawks ( are eligible for the Trail Hawk discount of $13.14.
To get your code or to become a member of the Lawrence Trail Hawks, contact RD Caroline. This discount cannot be combined with other discounts.

Cupless Race!

In an effort to continue the Lawrence Trail Hawks motto of "Kindness to Life and Land," we are requiring runners to bring their own hydration devices. We will provide a few cups by the water coolers at the aid stations if you are in need. There will be some cups available to runners for hot beverages only. Please help us with this transition by ensuring that you bring a hydration device, no matter what distance you run.
A limited number of 16 oz collapsable hot/cold cups will be available for purchase on race day for $15.

Some races give you hardware. Pi Day gives you flatware.

All finishers will receive a finisher's award and car vinyl with distance.

Keeping with the winter run tradition, all registrants will receive race gloves, made by Trail Heads.

A limited number of Pi Day hoodie jackets, long sleeve tech shirts, and short sleeve t-shirts will be available for purchase on race day. You can also order early with your registration to ensure you get the size/style you like.


We can't do this race without our wonderful volunteers. The volunteer list will go up in February. We'd love to see smiling faces with us. All volunteers will receive a special Pi Day Race Series t-shirt. Thanks to all who sign up!


1st, 2nd, 3rd place Male/Female/Open-field overall awarded for Pi Miler, Pi Day River Rotation Half Marathon, and Pi Day River Rotation Marathon races
Clydesdale and Athena competitive divisions are based on weight minimums outlined in the USA Triathlon Competitive Rules. Athletes competing in the Clydesdale division must be a minimum of 220 pounds and athletes in the Athena division must be a minimum of 165 pounds.

All finishers will receive a finishers award and vinyl for each distance they complete.
Runners that complete the Pi Slam will receive a special Pi Slam t-shirt. Ultra Pi Slam finishers will receive an Ultra Pi Slam trucker hat. The Answer to Everything finishers will receive an OrangeMud transition wrap towel (because towels and the answer to everything! :) ) Runners of the Pi Slam, Ultra Pi Slam, and Answer to Everything are eligible for place awards in the Pi Miler, Pi Day River Rotation Half Marathon, and Pi Day River Rotation Marathon.

Awards for the Miler will be presented at the finish line and announced at the starting line of the Pi Day River Rotation Half Marathon prior to its start.
Awards for the Pi Day River Rotation Marathon and Half Marathon will be awarded at the finish line.
All winners must be present to receive their awards.

Get More Information

Join us on Facebook to get some motivation, Pi humor/facts, meet your fellow runners, learn about preview runs, and for updates on the race!
You can also get preliminary racer guideline pdfs/images.


The Organizer’s refund policy is subject to change at the discretion of the Organizer and any such changes are published either within this refund policy, Facebook page, and/ or on the Lawrence Trail Hawks website.
You, as the participant, understand that we may cancel or postpone the Event if circumstances beyond our reasonable control. The Race Directors reserve the right to modify or cancel the race or course for safety concerns or natural disasters. In such cases, there will be no refunds of race entry fees. Each athlete must accept any such risk of their entry fee paid. There is no complimentary race entry to a future race. Entry fees collected are used to develop and produce the event, starting well in advance of the race date – including course preparation, race supplies, permits and administration. We pledge to make every effort to produce a fair and safe event for all participants. Any decision we make that impacts the race date or potential cancellation is carefully considered and based on the overall event safety and manageability.
The organizer will not refund any proportion of the Event Participation fee once the Participant has participated in the event. This policy is non-discriminatory and does not take account of any individual circumstances in order for fairness and clarity.

“We have taken enhanced health and safety measures – for you, our runners and volunteers. You must follow all posted instructions while attending any Lawrence Trails Hawks Race or Event. An inherent risk of exposure to COVID-19 exists in any public place where people are present. COVID-19 is an extremely contagious disease that can lead to severe illness and death. According to the Centers for Disease Control and Prevention, senior citizens and guests with underlying medical conditions are especially vulnerable. By choosing to attend this race, you voluntarily assume all risks related to exposure to COVID-19.” In addition, the Lawrence Trail Hawks cannot prevent you (or your child(ren)) from becoming exposed to, contracting, or spreading COVID-19 while participating in this event. It is not possible to prevent against the presence of the disease. Therefore, if you choose to participate in this event, you may be exposing yourself to and/or increasing your risk of contracting or spreading COVID-19. BY ATTENDING OR PARTICIPATING IN THIS COMPETITION, YOU VOLUNTARILY ASSUME ALL RISKS ASSOCIATED WITH EXPOSURE TO COVID-19 AND FOREVER RELEASE AND HOLD HARMLESS LAWRENCE TRAIL HAWKS AND EACH OF THEIR OFFICERS, DIRECTORS, OR OTHER REPRESENTATIVES FROM ANY LIABILITY OR CLAIMS INCLUDING FOR PERSONAL INJURIES, DEATH, DISEASE OR PROPERTY LOSSES, OR ANY OTHER LOSS, INCLUDING BUT NOT LIMITED TO CLAIMS OF NEGLIGENCE AND GIVE UP ANY CLAIMS YOU MAY HAVE TO SEEK DAMAGES, WHETHER KNOWN OR UNKNOWN, FORESEEN OR UNFORESEEN, IN CONNECTION WITH EXPOSURE, INFECTION, AND/OR SPREAD OF COVID-19 RELATED TO PARTICIPATION IN THIS


If local authorities, Lawrence River trail steward, deem the trails unsafe for runners or vulnerable to damage due to muddy conditions, an alternative course will be provided by the Lawrence Trail Hawks Race Directors.

March 8th and 9th Registration

Online registration will close on the 7th, but you can still sign up to run the races by going on Friday, March 8th to packet pickup and on March 9th at race day location sign in the registration tent. All races will have a cost increase on these two days.


All distances have until 6:00 pm March 9, 2024 to complete their distance.
To stay in the race, you must have left the aid station by 4:45 pm. Volunteers will breakdown the aid station at that time, and depart. Runners continuing on their own accord past the cutoffs, and not arriving at the Start/Finish on or before the 6pm cutoff, will not be eligible for the finisher awards.

Deferment Policy

Seeing you cross the finish line is the reason we host this race. If you’ve signed up for one of the events, but are unable to safely participate in the Hawk race, we offer the following options.

Runners may contact the Race Director and transfer to a lower or a higher distance on or before February 10th. In the event a runner transfers to a higher distance, a pro-rata charge will apply. No credit or refund can be given for runners transferring to a lower-distance race. You can also "EDIT" your registration on Ultrasignup and change the distance yourself; in the event you upgrade the distance the system will generate a code and prompt you to re-register for the new distance. If a race distance is SOLD OUT, you will not be able to change to the sold out distance.

The Pi Day River Rotation Race Series does not allow refunds or for the runners to transfer entries to other participants. NO Transfer Permitted: Race numbers and official participant bibs are assigned by the Race Director to each specific participant and may not be transferred, reproduced, replicated, or modified under any circumstance. You may not: 1) give or sell your number or tag to another person; 2) receive or purchase a number or tag from another person; 3) modify, make copies or other reproductions/replications of your number or bib for any purpose (or allow another to do so); and/or 4) participate with an unofficial race number or bib (i.e., a number or bib that was not assigned to you by the Race Director).
Attempting to do any of the foregoing is also prohibited and any person found violating these rules will be subject to penalties, including but not limited to disqualification and suspension from subsequent Hawk Hundred events.

If you drop to a different distance on race day will receive that distance's finisher award, if available. YOU MUST DROP AT THAT MILEAGE, IF YOU CONTINUE PAST AND DROP LATER YOU WILL BE RECORDED AS A DNF FOR THAT RACE DISTANCE. However, they are not eligible for the 1st, 2nd or 3rd place awards of that distance.

Runners may defer their race entries to the following year, by notifying the Race Director on or before February 10th. Deferral will NOT be permitted for any runner making a request less than 30 days before the scheduled event. The race Deferral is good for one year only. Requests for deferral must be submitted in writing to the Race Director; given the press of other preparations, runners should make sure their request has been confirmed. The deferral code must be obtained from the Race Director and used within the first 45 days of the next year’s race registration.

If you can’t attend, and haven’t deferred, please let the Race Director know at least seven days before the race, so your name can be removed from the starters list. You also have the option to remove yourself from the race on Ultrasignup. If you don’t show up, and don’t let us know in advance that you can’t make it, you’ll be recorded as DNS in the race results.


We are happy to share that Mile90 Photography will be shooting again in 2024. You can visit to see past year's photos. Mile90 started taking photos for us for a few years now. Most of the wonderful photos you'll see on here and on our Facebook page are courtesy of them.

Event's current local time: 4:32 PM CT


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