The vegetation found along the crest of Sentry Hill (341.1m or 1,119.094 ft) and St. Peters Hill (316.2m or 1,037.401 ft) are best described as seasonal evergreen forest. This centrally-located ring of hills in the shape of a horse shoe forms a cul de sac in the valley below. Along the St. Peters - Sentry Hill ridge is the primary rain forest with a varietyof flora and (avi-) fauna.
There are different species of mosses, lichens, fungi and flowering plants such as bromeliads and orchids. Butterflies, moths, dragon flies and humming birds are just some of the animals to be found in the forest. Sentry Hill also boasts impressive geological features, large rock formations that form the peak of the hill with crevices and caves that serve as nesting areas for bats and geckos. Sentry Hill offers magnificent birdís eye view of Philipsburg in the east and westerly Cole Bay and environs.