4 Days 

Mount Meru is the fifth highest mountain on the African continent and the second highest in Tanzania and dominates the Arusha National Park .It reaches 4,566 metres (14,980 feet) in height but has lost much of its bulk due to an eastward volcanic blast about 8,000 years ago.
Mount Meru most recently had a minor eruption about a century ago. The several small cones and craters seen in the vicinity reflect numerous episodes of volcanic activity 

Itinerary

Day 1: Momella gate (1500m) to Miriakamba (2500m)
Visitors spend the first night at Miriakamba at (2500m) from the Momella gate Miriakamba they are two routes southern and Northern routes. Southern road takes about 5 hours walk to from Momella gate to Miriakamba hut. Through this route visitors can have chance to see almost all mammals found in the forest. Therefore you can see a lot of birds including birds of prey. It’s possible to see several species of butterflies such of Mocker Swallow tailed, Soldier commodores, blue Swallow tailed, Golden winged forester, Mother of pearl, etc.
Northern route: Takes between 3-4 hours from Momella gate to Miriakamba. This is a shorter and steeper route. Along the way you can have the great views of Mt Kilimanjaro and Momella lakes are spectacular. Common mammals along this route are Cape buffalo. Maasai giraffe, Warthogs, Bushbuck etc. Present birds are Hartlaubs turaco, white fronted Bee Eaters, fiscal shrike, tropical Boubou, stone chat, variable sun birds olive pigeon. Dinner and overnight at Miriakamba hut.

Day 2: Miriakamba to Saddle (2500mt) to (3500mt)
It takes 3-4 hours. Along this portion of the route the visitors do enjoy the spectacular views of Mt. Kilimanjaro. Momella lakes. Meru crater, Ashcone, Mt Meru cliff and the little Meru. Through the forest. Common animals include Buffalo, Bushbuck and black and white Colobus.
Attractive wild flower such as Empetient species,Red hot pocker, Orchids, fire ball, lily. Shrubs are Erica arboreas, Stoebe Kilimandscharica and etc. The trail takes the visitors through striking tree species such as Hygenium abyssinica, and podacarpus. You will arrive at noon time here you will have lunch and start the ascend the little Meru is possible even during the afternoon. After a little Meru you will be back to Saddle for dinner and overnight.

Day 3:Saddle to Summit
Takes about 5-6 hours. The start for the Summit is done early in the morning.this is the place where visitors enjoy the most views of Mt Kilimanjaro little Meru ,Meru crater ,Achcone. Momella lakes, Cliff face Meru Summit Ngorongoro crater highlands, Arusha city sunrise and sunset Klipspringers and mountain Reedbucks are seen over rocks. Birds like white necked raven, Bearded vultures, stone chat, cliff chat, Alpine swift can be seen in this higher elevations. While walking along the trail to Saddle it is possible to step on wild flowers like Alchemilla Helocysum, and iris flowers. After reaching the Summit at 4566MT you will walk all the way down back to Saddle for the lunch and a bit sleep then you will processed to the Miriakamba for dinner and overnight.

Day 4:Miriakamba to Momella gate
For those who walked up through the shorter route will take the longer route while going down is not advisable. Please take your time to enjoy scenic beauty as well as occasional sightings of the game. At the gate you will find your porters and the transfer car waiting for you: drive back to your hotel for the shower and relaxing prepare for the next climb to mountain Kilimanjaro or safari to Serengeti or ngorongoro crater.