Mountainous regions around the world are sites of important atmospheric archives, yet heterogeneity of microclimates within individual alpine regions renders regional interpretation of these archives problematic. Analyzing a suite of similar archives that are spatially unique may help constrain the regional context under which archives from alpine regions interpreted. Chemical analyses of ice cores and snowpit samples from 3100 m.a.s.l. to 5300 m.a.s.l. in the St. Elias Mountains show evidence of regional atmospheric stratification. For example, the Pb flux from 1975 - 1998 as measured in ice cores from PR Col (5300 m.a.s.l.) and Eclipse Icefield (3100 m.a.s.l.) are statistically uncorrelated (R2 = 0.0468) suggesting that the sites are receiving distinct Pb inputs either by atmospheric stratification of Pb from a single source or by receiving Pb from different sources. Attempts to determine the source of these specific Pb aerosols are currently being undertaken using Pb isotope ratios (²⁰⁶Pb/²⁰⁸Pb and ²⁰⁷Pb/²⁰⁸Pb). Preliminary observations comparing Cs and U concentrations to the &deltaD timeseries for the Eclipse Icefield core possibly show seasonal signal related to the seasonality of trans-pacific transportation of continental dust.