Every spring, small depressions in the forest floor come alive, filling with rain, melting snow, and, eventually, salamander and frog eggs. By summer’s end, many of these vernal pools will dry up, revealing little trace of the life they contained in April. Join Brett Amy Thelen for a moderately strenuous, 1.2-mile roundtrip climb to a hilltop vernal pool at the Horatio Colony Nature Preserve, where we’ll explore the fascinating world of spring-breeding amphibians. Meet at 1 p.m. at the Preserve parking lot on Daniels Hill Road in Keene. Back by 3 p.m. Co-sponsored with the Horatio Colony Nature Preserve.