Monrovia Peak is set within San Gabriel Mountains National Monument, approximately four miles (6.4 km) northeast of the community of Monrovia and 20 miles (32 km) northeast of downtown Los Angeles.

[6] Topographic relief is significant as the summit rises over 1,800 feet (549 meters) above Cold Springs Canyon in approximately one mile.

[9] Most weather fronts originating in the Pacific Ocean travel east toward the San Gabriel Mountains.

As fronts approach, they are forced upward by the peaks (orographic lift), causing them to drop their moisture onto the range.

Precipitation runoff from this mountain drains into the San Gabriel River watershed.