Hiking in the Usambara mountains is a fantastic relaxing experience. Let your subconsience work on you as the impressions pass by.
You will hike 5 to 10 km each day meeting your luggage at a new location everg evening. The locations are chosen so you experience villages, rual areas and a nun monastry.
Usually people like to combine hiking with a safari and / or a visit on Zanzibar. Look at these possibilities.
A hike in the Usambara mountains will probably be a part of your experience in Tanzania. We reccomend that you hike in the end of your trip or maybe just before going to Zanzibar to relax.
Hiking cleans the mind and the impressions from your safaries, visits to Massai villages, Arusha market noises can nicely rest while still being present before rotating home.
Use at least two days for hiking. We reccomend 3 or 4. Hiking is not expensive and it is here you meet people on the road, see the small villages and can discuss the local village life with your fellows or the guides.