Amacuzac River, Morelos state, 16 July 1979 – the first descent ; section from source to tributary with Mixteco River (distance 50 km)

Balsas River, 1979

Mixteco River, 1979    the first descent, although the river was run earlier by Mexican boaters (not kayakers)

Pescados River, 1979, first descent (a year earlier, a Mexican-US expedition was forced to abandon after one of the members got killed)

Atoyac River, March 1980, - the first descent

Moctezuma River. March 1979, class III river flowing through tropical rain forest and desert

Santa Maria River, April 1-9, 1979, class IV-V river , flowing through five gorges – the first descent

Rio Grande de Santiago, June 1979

Marble Canyon, November 1979

Wind River, Wyoming, November 1979

Aguacapa River, August 23, 1980, (filmed by national TV) – the first descent

Rio Grande de Matagalpa, September 1980 (distance 150 km) – the first descent

Reventazon River, September 14, 1980, class III tropical river

Pacuare River, September 1980, class III-V tropical river – today immensely popular.
The first descent (conducted during high water (class IV-V)).

Santa Maria River, October 1980

Chirigui River, October 1980 -very technical and difficult river

Napo River, 1980

Aguarico River, 1980

Marańon River, March 23-25, 1981 during rain season, section from Puente Chaqual to Balzas (200 km)

Colca River, May 19 –June 14, 1981- the first descent of the entire Colca Canyon

Apurimac River, July 4-6, 1981     high elevation section between Cailloma – Machu Puente

Vilcanota River, August 1981, distance 174 km to Ollantatambo

Gallegos, October 1981