Ten Mile River Scout Museum's exhibit "Before TMR" opens Tuesday July 9, 2024. This exhibit explores how the 10,000+ acres Ten Mile River Scout Camps property was used before purchase by the New York City Scouts in 1927 & 1929. 2024 hours: Saturday: 9 am - 12 noon | Sunday: 11 am - 3 pm | Tuesday - Friday: 9 am - 12 noon, 1:30 - 5 pm, 7 - 8:30 pm.