Bull trout, a federally threatened species, are native to several drainages within Mount Rainier National Park, including the Puyallup River basin and many of its tributaries. The life history and migratory patterns of bull trout in the Puyallup River basin are variable and largely unknown. The best-known life history patterns are migratory forms which may display fluvial or anadromous patterns, and presumably resident forms which likely reside solely within small headwater drainages. Little information is known regarding the specific movements and habitat use of bull trout in the basin. We aim to use the natural variation in elemental and isotopic tracers of river waters and fish fin rays across the Puyallup basin to infer movement patterns among different habitats.