The Trimble Forest is on 127 ha of stony river terrace located on the eastern side of State Highway 2 18km north of Masterton. The forest was first planted in Radiata pine in 1950. That crop was harvested in the late 1970s and a second one planted. About half the second crop was harvested in 2001 and the felled area replanted again. The site is flat, frosty and weed infested but earlier crops have yielded good logs described as short and fat. The flat free draining site next to a State Highway means that harvesting costs are low and harvesting can continue all year, something not often found in the Wairarapa.