• Lifeguards on weekends only: the Wasserwacht station at the Flauchersteg is staffed 10am to 7pm on summer weekends and holidays in swimming weather, and nobody is on duty on weekdays
• Water shoes and close watching, since broken glass and sharp stones turn up on the gravel and the current is strong even where it looks shallow
• Nude bathing zone on the big gravel bank just east of the Flauchersteg, so head downstream if you'd rather avoid it

Flaucher is the stretch of the Isar between the Flauchersteg footbridge and the Braunauer railway bridge, where the river splits into shallow side channels around wide gravel banks. Kids wade and splash in alpine water that rarely tops 20°C, even in midsummer.

The banks double as a grilling and meeting spot, so summer weekends get crowded, though quieter corners turn up along the branching channels.