Global anthropogenic climate change and evolutionary history may interact to influence species responses to altered environmental conditions, such as increases in temperature. However, populations within a species may react differently to these changes based on their geography and evolutionary history. Pseudacris regilla, commonly known as the Pacific chorus frog (PCF) is widely distributed across Western North America, spanning a wide geographic range. In an effort to test the response of two geographically separated populations to changes in temperature, we compared growth and development rates of PCF tadpoles from western Oregon and eastern Washington near the cities of Corvallis and Spokane, respectively, during the summer of 2025. We used experimental treatment groups from two sequential experiments to opportunistically explore the differences between the two populations’ responses to shifts in temperature. We investigated tadpoles’ rate of mass and stage change per day under two different temperature conditions, one representing historical average temperatures and one representing warmer future conditions (+3°C above historical average). We used 24 PCF tadpoles from Oregon and 20 PCF from Washington. We found that tadpoles from both locations reached metamorphosis faster in the elevated temperature groups (p<0.0001). Furthermore, tadpoles from Oregon developed faster compared to Washington tadpoles (p<0.0001). In addition, tadpoles from Oregon had less overall change in mass regardless of temperature treatment (p= 0.0002). Analysis is still ongoing, but these data suggest potential population-level differences in response to environmental shifts expected with climate change.