Celebrate your love of pi and pie! Take on the Pi Miler (3.14 miles) or the River Rotation Half Marathon on the fun, fast, and flowy Lawrence River Trails.
The 16.24 mile Pi Slam combines the Pi Miler and River Rotation Half Marathon. It is the perfect challenge to add a little more distance to your day.
After the race, enjoy some pie at the finish line with your finisher's fork!
Water, electrolytes, energy snacks, fruit, and other items will be available on the course.
A smaller aid station is near the 5K Loop turnaround, about halfway through the race for Pi Milers.
Half Marathoners will pass the smaller aid station during each of your loops, about 1.5 miles after leaving the trailhead and again on the way back. Half Marathoners will also have access to a larger aid station at the trailhead. You will pass it twice during the race at intervals of ~5 miles.
We encourage runners to bring your own reusable hydration bottles or cups, in keeping with the Trail Hawks motto "Kindness to Life and Land". We will provide a few cups by the water coolers at the aid stations if you are in need.
The Pi Miler begins at 7:30 AM. The Half Marathon begins at 8:30 AM.
Pi Slammers will begin with the Pi Milers and must be back at the starting line by 8:30 AM to join the Half Marathon.
Awards will be presented at the finish line.
Packet pickup details will be announced prior to the race.
We can't do this race without our wonderful volunteers! Contact RD Kate Becker with questions. Thank you for making this event possible with your time and talents.
If you've signed up for one of the events, but are unable to safely participate in the race, we offer the following options.
Runner safety is a top priority for our event. Respect all participants and volunteers to ensure a safe and enjoyable race for everyone.
The Lawrence River Trails are relatively flat singletrack with a few short hills. They are flowy and not too technical, with only a few roots or rocks. Races begin at the Levee gate, go down through the parking lot, and enter the River Trails on the south (right-hand) side. The Pi Miler is one loop following the 5K Loop route. The Half Marathon is three loops on the trails.
The Pi Day River Rotation race will have an end time of 1:00 PM. This allows our volunteers to pack up in a timely manner so the Lawrence River Trails can be free for other users in the afternoon.
For half marathoners, that allows 4.5 hours to complete your race (about a 20:35 per mile pace).
To ensure you make the cutoff time, half marathoners must leave the aid station to begin their final loop of the course by 11:45 AM. Participants who start a loop after 11:45 AM continue on the public trails at their own risk, without support from the race.
If the trails are unsafe for runners or vulnerable to damage due to muddy conditions, an alternative course will be provided by the Lawrence Trail Hawks Race Directors. The alternate course will most likely be on the packed-gravel Lawrence Levee Trail.
Lawrence River Trails, Lawrence, KS, USA Open in Google Maps
Lawrence is a city and the county seat of Douglas County in northeastern Kansas, and it is the state's sixth-largest city. It lies between the Kansas and Wakarusa rivers and is a college town, home to the University of Kansas and Haskell Indian Nations University. The climate is continental, with hot, humid summers and cold winters, so spring and autumn are the best seasons to race.
Leashed dogs are allowed. Dogs must be well behaved and under control at all times, and you must pick up after your dog.
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