Jonathan M Gladstone
Gladstone competed in the the 2012 Little Red Lighthouse Swim. He finished tenth in the 2013 eight mile Boston Light Swim. He also participated in the first P2P relay swim on 1 August 2014 with Nathaneal Dean, Kate Owen and Helen Lin, crossing Cape Cod Bay (also known as the American Channel) in 8:43:46.
Cold Water Swimming
Gladstone competed in the inaugural Cold Water Challenge, a 2.6-mile jetty-to-jetty ocean swim in Penfield Beach in Fairfield, Connecticut. On 8 December 2013, he completed an ice swim in South Boston under the auspices of the International Ice Swimming Association, swimming 1.05 miles in 38:39 in 3.33C (38.0F) water. He also participated in the 2015 United States Winter Swimming Championships in Lake Memphremagog, Vermont.