Frage

01 Nordalpenweg, E26 (alpin): Matras-Haus - Riemannhaus

There are no natural sources. No fountains or anything similar. Melting ice is not a good idea. You can buy water at the huts. You have to carry at least 3 l, depending on the weather.

That's right no water on this tour. Either you carry up enough (2-3 litres for sure on this tour only - not counting descent - depending on weather) or you buy something at Riemannhaus or Matrashaus. In early summer there might be melting water at Wildalmkirchlbiwak but I would not rely on this.

Thanks. I'm planning to tour from Werfen to Lofer, carrying 10 l uphill to be on the safe side is out of the question :)

Carry 10 extra Euros for water on the huts and you'll save some kilos. ;)