Results/Conclusions We found no evidence that wood frog populations differed in abundance, body size, or metamorphosis patterns between fish-bearing stocked and unstocked lakes. In a naturally fishless (and unstocked) lake, however, adult and metamorph wood frogs were both more abundant and larger than in lakes containing fish. Size structures of minnows suggested that size-limited predation by trout was occurring, and forage fishes were more benthic, more concentrated inshore, and/or less diurnal in the presence of trout. These effects did not, however, translate into significant population-level impacts; densities of forage fishes (fathead minnow, brook stickleback, dace spp.) did not differ between stocked and unstocked lakes. Likewise, littoral macroinvertebrate assemblage composition did not differ consistently between stocked and unstocked lakes, while differences in the abundances or sizes were found in relatively few taxa. Our comparisons suggest that there were limited impacts on native communities of the lakes into which trout were stocked. Greater productivity, structurally complex littoral zones, and impacts of native fishes may buffer communities in these foothills lakes from severe impacts observed elsewhere.