Runs within the Hamakua district (north central).
Mana Road
Easy gravel road running on the northern slopes of Mauna Kea
• 0 to 41mi one way; turn around whenever • dirt, gravel road • Warm to Cool
Mauna Kea R1
A dirt road encircling 3/4 of Mauna Kea between 5800' and 9500'
• 36mi one-way • Forest road, puddles • Cool
Humu'ula Trail (Hamakua)
A muddy non-trail through the jungle
• ~10.5mi round trip (theoretical) • Forest mud, leaves • Cool