Obersee

Obersee in Arosa is the larger of the two lakes inside the Swiss resort village of Arosa, in the canton of Graubünden. It sits at roughly 1,735 m above sea level, a few minutes' walk from the village centre. Its surface covers about 7 hectares and is framed by spruce-covered slopes, which makes it a natural gathering spot in every season.

What is the Obersee and how big is it?

The lake is about 390 m long and 250 m wide, with a maximum depth of 13 m and an average near 7 m. The Mittelbach stream links it to the smaller Untersee, which lies lower, at around 1,690 m. A quirk of local administration: both lakes belong to the civil community of Chur rather than to Arosa itself. Do not confuse this lake with other waters called Obersee, such as the one in Glarus or the upper basin of Lake Constance.

How do you get there?

The shore is right beside Arosa railway station. The scenic mountain railway from Chur brings you to the resort, and the water is practically in front of you when you step off the train. Drivers can leave the car in the car park building next to the lake.

What can you do here in summer?

Rowing boats and pedal boats are available for hire in the warm season. A water show takes place several times a week and is best watched from the lakeside path. Anglers fish the shallows, and on hot days some visitors swim, though alpine water stays cool. The lake is also a handy starting point for a walk around its edge and on towards the Untersee.

What happens on the lake in winter?

When the surface freezes and is covered with snow, the lake turns into an event venue. It hosts a traditional horse race on snow, a winter golf tournament and a hot-air balloon week, making it one of the signature spots of Arosa's winter calendar.

Is there wildlife?

Yes. Water birds and reed birds live around the lake, including diving ducks and most European dabbling duck species. Early morning, before the shore fills up, is the best time to watch them.

When should you visit?

Summer brings boats and the water show, while winter brings snow-based events. Spring and autumn are quieter, with the same mountain views. Check the Arosa Lenzerheide tourism site for the current programme and seasonal details.

Frequently asked questions

Can you go boating on the Obersee? Yes, rowing boats and pedal boats are rented out in summer.

How many lakes are there in Arosa village? Two: the larger upper Obersee and the lower Untersee, joined by the Mittelbach stream.

Can I walk to the lake from the station? Yes, the lake is right next to the railway station, and a car park building stands beside it.

Is the lake worth visiting in winter? Yes, it hosts a horse race on snow, a winter golf tournament and a balloon week.