Bolivian Visa Information: Citizens are required to have a Visa to visit Bolivia. Please plan accordingly to secure visas with enough time before travel date. The cost of the visa is not included in the tour price.
Here is a link to the Bolivian site where you can apply for the visa online: http://www.boliviawdc.org/consulate/visas/tv
Here are a few websites with more information and Bolivan visas and services:
https://www.passportsandvisas.com/embassy-consulate/bolivia
https://www.wikihow.com/Obtain-a-Visa-for-Bolivia-As-a-U.S.-Citizen