PromPeru : San Martin
- Detailed description including location, history, main attractions, typical food, travel services and festivities calendar.
- http://www.peru.info/e_ftociudadeseng.asp?pdr=665&jrq=3.21&ic=2&ids=1319

TinganaPeru.com
- Tingana Magic tour operator based in Moyobamba offers packages throughout the Alto Mayo area (Rioja and Moyobamba) combining adventure tours and eco tours.
- http://www.tinganaperu.com/en/

United Nations Office on Drugs and Crime
- Alternative Development in the Lower Huallaga Valley in San Martin Peru. Brief details of 4 programs for activities which replace cocaine production: coffee, cocoa, palm oil and cashew nuts.
- http://www.unodc.org/pdf/peru/oro_verde.pdf

Schaffer Library of Drug Policy
- Report discussing aspects relating to the Santa Lucia antidrug base, in the Upper Huallaga Valley in Peru and the rational for discontinuation of operations there.
- http://www.druglibrary.org/schaffer/govpubs/peru1.htm

National Geographic Society Research
- Final report of Grant #5791-96: Floristic Inventory of the Bosque de Protección del Río Alto, San Martín, Peru, including photos and maps.
- http://www.sacha.org/NatGeo/NatGeo_Final.htm

San Marcos
- History, geography and customs of this settlement in the department of San Martin.
- http://www.tagnet.org/ininpe/intro/sanmar.htm