Meru is a great preparation hike for climbing Kilimanjaro, or a spectacular trek for those not compelled to do Kilimanjaro. You will hike past wildlife, the landscape is spectacular, and sunrise on the summit has Kilimanjaro as the backdrop.
While it can be done in only 4 days, it is not an easy peak to summit. To reach the top (almost 15,000 feet), there is some scrambling on rocks in the dark and at high altitude. You should be prepared for at least 10 hours of hiking on summit day. For an easier hike, you can climb just to Rhino Point for sunrise overlooking Kilimanjaro, and then descend.
Mt. Meru is in Arusha National Park. In Arusha National Park all hikers must be accompanied by an armed ranger. This ranger is employed directly by the national park. You will also have your own mountain guide, who is managing the crew and watching out for your safety.