Mummelsee
A small dark lake in a glacial hollow, attached to a legend of water sprites and a lake king.
Updated 19 October 2026

AI illustration
The Mummelsee lies at about a thousand and thirty metres in a cirque scooped by ice below the Hornisgrinde, the highest summit of the northern Black Forest. It is small, roughly eight hundred metres round and seventeen metres deep, with dark water because the surrounding peat stains it and there is little inflow. The name is usually traced to Mummeln, a local word for the white water lilies that once grew here in numbers, though the water sprites of legend, the Mümmlein, may also have given it, and local legend fills it with nixies and a lake king; Eduard Mörike wrote a ballad about them. A path circles it in twenty minutes and rowing boats are hired in season. A hotel and shops sit at the roadside.
The landscape
- The dark water - a peat-stained cirque lake below the Hornisgrinde.
- The shore path - a circuit of about twenty minutes.
- The legend - water sprites and a lake king in local folklore.
- The Hornisgrinde - the northern Black Forest's highest summit above.
When to go
May to October; the lake freezes in winter and the road can be snowbound. It is on the High Road so it is busy with passing traffic through the day.
Practical notes
The site is very commercialised with a hotel, shops and paid parking directly on it. The lake is small, seen in half an hour. Weekends are crowded.
Nearby
The Hornisgrinde rises above; Baden-Baden lies north.
Key facts
Source: Wikidata, item Q650335, read on 18 October 2026.
What to pack for Mummelsee
Chosen from what this place is for. Tap a kit for the full checklist.
- Broken-in walking shoes or boots - Grip and ankle support matter more than looks; never hike in brand-new boots. Find on Amazon
- Layers + a waterproof shell - Mountain weather turns fast; a packable rain jacket saves the day. Find on Amazon
- Daypack with rain cover - 20-30 litres holds water, snacks, layers and a first-aid kit. Find on Amazon
- Offline maps + a power bank - Download the trail before you lose signal; carry backup charge. Find on Amazon
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Where to start if Mummelsee is going on the list.
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Opening times, ticket prices and seasonal closures change - check the official source before you go: official site.


