Southwestern Elephant Butte Lake State Park New Mexico near Truth or Consequences, NM the old town that used to be called Hot Springs. This lake has a green color near the shallows when observed from the lookout point on the road where this painting was completed from. Original watercolor southwest painting. Marina del sur is located in this image. This lake is the largest and most popular lake in New Mexico. Around 100 million years ago the lake a was part of a shallow ocean. When the ocean dried the area was the favorite hunting ground of the tyrannosaurus rex dinosaur. Original mountain and lake painting 11 × 15 inches on Arches archival professional watercolor paper