These data are the result of 2 years of pond-breeding amphibian visual encounter surveys conducted across a range of pond types (from highly ephemeral to permanent hydrology) in Mount Rainier, North Cascades, and Olympic National Parks. The R code includes well-annotated code for reorganizing and sub-setting the master data, which should make it much easier to work with than the raw spreadsheet. Associated hydrologic data may be of use for other research applications. Recognize that this amphibian dataset is tied to 1) hydrologic projections developed using the Variable Infiltration Capacity model, which provides historical reconstructions of hydroperiod for most of 20th century and future hydrologic projections under climate change through the 2080s, 2) algorithms for remotely classifying montane wetlands and new wetland maps for Mount Rainier National Park.