Tourist visas are valid for 30 days from the date of entry. They may be extended up to 90 days depending on the nationality of the tourist. Specific purpose visas are also valid for 30 days and may be extended up to 60 or 90 days at the immigration office at Bolivia. Transit visas are valid for 15 days while student visas are valid for a period of 60 days.
As visa and passport information can be changed with little to no notice and varies according to your nationality it is advisable to check this information with your relevant embassy prior to travel.