The park is open non-stop unless the weather condition get too dangerous. Please, check the official website before your planned trip.
General tickets (valid for three days)
Private Vehicle: $25
Motorcycle: $15
Per Person: $12
Wikipedia https://pt.wikipedia.org/wiki/Parque_Nacional_de_Haleakala
Official website http://www.nps.gov/hale/index.htm
Facebook http://www.facebook.com/pages/Haleakala-National-Park/348662787511
Telefone +1 808 572 4400
Coordenadas 20°42'25.822" N -156°9'33.911" E