Data from high frequency sampling of multiple carbon forms were collected in a predominately rain-fed watershed in Southeast Alaska during the main run-off season (May-October 2021). The dataset includes hourly measurements of stream temperature, specific conductivity, turbidity, and fluorescent dissolved organic matter, point samples of dissolved organic carbon (DOC), alkalinity/dissolved inorganic carbon (DIC), delta 13C DIC values, and modeled hourly DOC values. The objective of this study was to collect data on carbon export and flow to model watershed export of carbon forms.