After breakfast depart from Arusha drive to Marangu Gate with a picnic lunch.
At arrival issue and Complete your registration at Marangu Gate (1860m) , Start hike through rainforest from the park gate (6000ft) to Marangu Hut (9000ft) spending 3 or 4hours Stop half way for lunch
Reach Mandara Huts after a short tour starting coming down to Marangu Gate
Late afternoon may reach at the gate and drive back to Arusha