Mountain Training Exercise (MTX) is a service level training exercise (SLTE) and the annual capstone Marine Corps Mountain Warfare Training Center (MWTC) training event for Marine Forces Reserve (MFR). MTX 4-23 units will conduct mountain training exercises allowing Marines to sustain warfighting functions while participating in realistic combat training in a mountainous environment. The purpose of MTX is to increase readiness and challenge units’ ability to plan and perform.