Lace-up for a mathematically marvelous challenge at the Pi Day River Rotation in Lawrence, Kansas, on March 14, 2026! This beloved event, organized by the Lawrence Trail Hawks, invites runners to celebrate their love of pi—and pie—across scenic, flowing singletrack trails. Choose your perfect distance from the precise Pi Miler (3.14 miles), the classic Half Marathon (13.14 miles), or tackle the ultimate "Pi Slam" at 16.24 miles by combining both races.

The course unfolds along the picturesque Lawrence River Trails, offering a smooth, fast, and relatively flat experience with a few enjoyable hills sprinkled in for fun. These non-technical trails, with minimal roots or rocks, are ideal for both seasoned trail runners and those new to the off-road scene. Races commence at the Levee gate, leading runners through the parking lot before entering the beautiful river trails. Aid stations, well-stocked with water, electrolytes, energy snacks, and fruit, are strategically placed at the trailhead and finish line, with half marathoners passing them at approximately 5-mile intervals.

What truly sets the Pi Day River Rotation apart is its festive atmosphere, culminating in delicious homemade pie for all finishers. Runners rave about the friendly vibe and the unique opportunity to interact with fellow participants on the looping course. Expect typical race day conditions around 58°F highs and 34°F lows, with only a 10% chance of precipitation, making for pleasant running weather. Beyond the finish line, celebrate your achievement with a finisher's award and special car vinyl to commemorate your chosen distance.