Walking, cycling and boat trips are the best ways to explore the park.
From the cathedral entrance it's 2.5km (a 30-minute walk) to Ross Castle; to reach Muckross Estate on foot or by bike you have to follow the cycle path beside the N71 south for 3km where it veers off towards the lake (its 5km all up to Muckross House).
Jaunting cars depart from Kenmare Pl in Killarney town centre, and from the Jaunting Car Entrance to Muckross Estate, at a car park 3km south of town on the N71. Expect to pay around €15 to €20 per person for a tour from Killarney to Ross Castle and back. There are no set prices; haggle for longer tours.