Brown trout (Salmo trutta) redd locations in Iron Creek, Lawrence County, South Dakota, USA

This study documented brown trout (Salmo trutta) redds and their locations in the eastern most 1.8 km stretch of Iron Creek, Lawrence County, South Dakota, USA, during the fall of 2023. The first redds were observed on September 19, 2023. Weekly observations continued until no new redds were observed on October 27. Throughout the six-week period, a total of 67 redds were documented, with a peak of 19 redds on September 23. Stream temperatures varied from 2 to 10°C throughout the study, with the highest number of redds observed at 9°C. This is the first and only study to document brown trout redd locations and the timing of redd construction in Iron Creek.