What is the highest mountain in Ecuador?
Chimborazo
With a peak elevation of 6,263m (20,548ft), Chimborazo is the highest mountain in Ecuador. It is the highest peak near the equator. Chimborazo is not the highest mountain by elevation above sea level, but its location along the equatorial bulge makes its summit the farthest point on the Earth's surface from the Earth's center.
Ritacuba Blanco
Ritacuba Blanco is the highest peak of Cordillera Oriental, in the Andes Mountains of Colombia. It's also named Ritak'uwa, an ancient name from the U'wa indigenous people that live in the lowlands of the National Park Sierra Nevada del Cocuy y Güicán, where the Ritacuba Blanco is located. 
The summit is accessible from the west via the town of El Cocuy, the village of Güicán and the hamlet of Las Cabañas. The hike is fairly easy, but weather is not reliable, and a glacier must be crossed.
Because of global warming, its glacier is melting at very high rates, backing down 25 linear mts per year; same is happening at amazing speeds to all other snow-covered tropical mountains in Colombia. In 1950, Ritacuba Blanco's glacier extended down to above sea level; in January 2007 its lowest point was at above sea level. If this melting rate continues, the glacier is expected to disappear before 2025.