Croydon Bush and Forest Hill are remnants of the type of vegetation that once covered the limestone hills of the region, and a refuge for native birds, lizards and invertebrates. Native podocarp hardwood forest is home to a range of birds including bellbird, kūkupa (New Zealand pigeon), South Island fantail and tomtit, grey warbler, brown creeper, silvereye and tūī.

The weathered limestone boulders that are a feature of Forest Hill were once sediment on the floor of a shallow sea that covered much of what is now Southland sometime between 25 and 15 million years ago.

One of the most stunning times to visit Croydon Bush is at Christmas when the forest blushes with an abundance of flowering rātā.

Adjacent Dolamore Park encompasses 95 ha of native podocarp forest, expansive lawn areas and a range of exotic plantings. Extensive areas of mature rhododendrons make a spectacular show in spring. Dolamore Park provides camper facilities and is administered by the Gore District Council. 

The eastern end of Croydon Bush Scenic Reserve, accessed from Croydon Bush Road, is locally known as Grant's Bush. The Hokonui Tramping Club maintains three routes in this area.

Croydon Bush was established in 1893 when then mayor of Gore, Mr D L Poppelwell made a case to the government for the protection of the “fast disappearing bush.” This resulted in 130 ha being protected in 1895. Subsequent additions have increased the reserve to 867 ha.

The adjacent Dolamore Park was named in honour of the Dolamore family whose gift of £30,000 in 1947 made the development of the picnic area and facilities possible.