Named in memory of Theodore 'Teo' Chatzi. Start at Servia main square (26km SE of Kozani, 47km from Elassona). Marked trail through forest with terrain variety and stunning landscapes. 95% forest trails. Moderate difficulty. Time limit: 3h45m. 4 water/electrolyte stations on course. Traditional food at finish. Medical coverage with doctors, rescue teams, and first aid vehicle. Bib pickup: Sat Apr 18 11:00-14:00 and 17:00-21:00, Sun Apr 19 08:00-09:30 at Servia main square. Results published live at www.timing4s.com. Minimum age: 18 years. Max 340 participants.