The magnificent Ada Tree is a giant mountain ash estimated to be over 300 years old and one of Victoria's largest trees. Deep in the Yarra State Forest, two hours drive east of Melbourne, and close to Warburton, Powelltown and Noojee, the Ada Tree towers over the surrounding cool temperate rainforest at 76 metres tall and has a circumference of 15 metres. The Ada Tree can be reached by a walking track that starts at the Ada Tree car park and picnic area. The walk winds through cool temperate rainforest with groves of ancient myrtle beech, sassafras and tree ferns to reach a viewing platform overlooking this impressive tree. The 3.6 kilometre loop walk takes about 1.5 hours to complete, returning to the car park. This is a grade 3 walk with some uneven and natural steps, so some bushwalking experience is recommended. The Ada Tree walk features a boardwalk built for wheelchair access. All abilities access to the site is by a gated forest road (Federal Road) which can be reached from the main car park. The access road is 1.8 kilometres and leads to a smaller carpark about 10 metres from the all abilities boardwalk. To access this road, you will need to collect a key from the Powelltown Post Office at 1657 Little Yarra Road, Powelltown.