Pi Day River Rotation

Event details

The Pi Day River Rotation is a trail running event in Lawrence, KS, held on the Lawrence River Trails. It offers multiple distances on established looped trail routes. The race begins at the levee gate and uses the trailhead and nearby parking area for access. Registration closes before the event.

Distances

• 16.24 miles - Pi Slam combines the Pi Miler and half marathon
• 13.1 miles - River Rotation Half Marathon
• 3.14 miles - Pi Miler

Course and aid stations

The River Trails are relatively flat singletrack with a few short hills, few roots, and few rocks. The Pi Miler follows the 5K Loop. The Half Marathon consists of three loops: one loop run counterclockwise, one loop run clockwise, and the 4 Corners Loop. Turnarounds use permanent signage and will be flagged on race day. A smaller aid station is near the 5K turnaround. Half marathoners pass that smaller station once per loop and also pass a larger aid station at the trailhead twice during the race. Water, electrolytes, snacks, and fruit will be available. Runners are encouraged to bring reusable hydration bottles or cups; a limited number of cups will be provided.

Awards, cutoffs, and policies

Awards for 1st through 3rd place in each gender are given for the Pi Miler and Half Marathon. Pi Slam finishers receive a special swag item and are eligible for place awards. The race enforces an overall end time and requires half marathoners to begin their final loop before the race deadline; participants who start a loop after that deadline continue without race support. Runners may transfer distances or defer entry under the stated race policies and deadlines. Volunteer sign-up will open in advance of the event. Visit the organization's website for the most recent information.