Marmots can be extreme loud and shocking. Today I ran a trail up to the Steinkasern Alm in Voldertal (valley) and there suddenly a marmot howl its alarm signal just 10 meters in front of me on a big boulder. Got nearly a heart attack. I could approach to the marmot nearly 5 meters in front of me. There was a snow field between us.

Here are the trail area and dates...