CONTACT DETAILS (914) 893-4229 hartsdale@oneriverschool.com VISIT US Schedule a Tour SCHOOL HOURS Monday9:00 a.m. - 7:15 p.m. Tuesday9:00 a.m. - 7:30 p.m.Wednesday9:00 a.m. - 7:45 p.m.Thursday9:00 a.m. - 9:00 p.m.Friday3:15 p.m. - 7:15 p.m.Saturday9:00 a.m. - 5:30 p.m.Sunday9:00 a.m. -5:00 p.m. DIRECTIONS SEND US A MESSAGE Take a Virtual Tour