Charity hike in memory of Eva, a pupil of the Trekkers founder who died at 13, in support of ELPIDA, the Association of Friends of Children with Cancer. 6.5 km through the fir forest from the Steni saddle between Dirfys and Xerovouni, about 2.5 hours, +280/-454 m, grade easy 1/5, ages 10+. Optional lunch and free time in Steni afterwards. Trekkers organise and guide it for free: the €40 covers only the coach, and the rest goes to ELPIDA (participants get the deposit receipt by email). Meet 06:45, coach leaves 07:00 from the Museum of Contemporary Art (Syngrou-Fix metro), then Nea Filadelfeia junction 07:20, Kalyftaki bridge 07:25 and Agios Stefanos (Choriatiko) 07:30; back about 20:30. Book and pay online on trekkers.gr; bookings are per person.