[1] Precipitation runoff and glacial meltwater from the mountain's slopes drains into tributaries of the Delta River.

Topographic relief is significant as the summit rises 4,200 feet (1,280 meters) above the Richardson Highway and Phelan Creek in 1.5 mile (2.4 km), and 3,200 feet (975 meters) above the Canwell Glacier in two miles (3.2 km).

Minerals present include chrysocolla, serpentinite, hematite, chromite, quartz, calcite, pyrite, and malachite.

[5] Rainbow Ridge is an excellent site for collecting fossils of trilobites which are about 315 million years old.

[6] Weather systems are forced upwards by the Delta Mountains (orographic lift), causing heavy precipitation in the form of rainfall and snowfall.