This document details the amphibian inventories conducted in Mount Rainier National Park primarily from 2001 to 2003 with a small amount of data collected in 2005. These inventories were part of a larger effort to document species presence at five North Coast and Cascade (NCCN) Parks: Mount Rainier National Park (MORA), Ebey's Landing National Historical Reserve (EBLA), Lewis and Clark National Historical Site (LEWI), Fort Vancouver National Historical Park (FOVA), and San Juan Island National Historical Park (SAJH).