Sonntagshorn Loop

This tour is rated as difficult and very challenging, primarily due to its extensive length of approximately 67.8 kilometers and significant elevation gain of over 1,500 meters. While technically rated S2 (moderate difficulty) on the singletrail scale, the sheer distance and climbing make it a demanding ride suitable for experienced mountain bikers with good fitness. Expect steep ramps and serpentines, with some sections requiring you to dismount and push your bike.

You'll ride through diverse terrain, including alpine meadows and dense mountain forests. The path mainly consists of gravelly but well-passable forest roads, with a few technical, yet consistently rideable, single trails. Be prepared for steep ascents and descents.

The tour offers numerous stunning views and natural features. You'll pass by the hidden high plateau of Heutal, the expansive Winkelmoos Alm, and crystal-clear mountain lakes like Weitsee, Mittersee, and Lödensee, an area locals call 'Klein-Kanada'. A unique highlight is the Ascent to Kaitlalm and the Herbstalm. You'll also get views of the Chiemgau and Kaiser Mountains, with the Sonntagshorn itself being the highest peak in the Chiemgau Alps.

Yes, the tour crosses the international border between Germany and Austria, taking you through the unique 'Bayerische Saalforste'. A notable feature is the Staubfall waterfall; while scenic, the path briefly leads behind the cascading water, and this section is closed for cyclists, requiring you to traverse it on foot. Also, be prepared for sections, particularly on the climb to Sellarnhöhe, where pushing your bike might be necessary.

The best time to undertake this tour is typically from mid-June to September. During this period, the weather is generally favorable, and many of the traditional refreshment stops along the route, such as Schwarzachenalm, Keitalm, and Reiteralm, are open.

While the exact starting point can vary, many riders begin in areas like Reit im Winkl or Ruhpolding. Given the tour's length and border-crossing nature, careful planning of your starting and parking location is essential. Public transport options to these towns are available, but consider the logistics for returning to your starting point.

Generally, there are no specific permits or entrance fees required for mountain biking on designated trails in the Chiemgau Alps. However, always respect local regulations, especially when crossing into Austria or passing through protected areas like the 'Bayerische Saalforste'. No special permits are needed for this particular route.

While dogs are generally allowed on many trails in the Chiemgau Alps, this specific tour is very long and demanding. If you plan to bring your dog, ensure they are fit enough for such a strenuous and lengthy ride. Always keep your dog on a leash, especially in alpine meadows where livestock may be present, and near wildlife.

Yes, the tour offers numerous traditional refreshment stops ('urige Einkehrmöglichkeiten') including the Schwarzachenalm, Keitalm, and Reiteralm. There are also guesthouses in Heutal and on the Winkelmoosalm, which are typically open from mid-June to September. It's always wise to carry enough water, especially on longer stretches between these stops.

Yes, the route intersects with several other paths. You'll find sections that overlap with the Mozart-Radweg, the Watzmann-Hochkönig Nord-Runde: Etappe 2: Unken – Reit im Winkl, and the Chiemgau-Radweg, among others. This can offer options for extending or modifying your ride if you're familiar with the area.

Given the tour's length and difficulty, you should bring a well-maintained mountain bike, appropriate safety gear (helmet, gloves), plenty of water and snacks, a repair kit, and weather-appropriate clothing. A navigation device with the route loaded is highly recommended due to the tour's length and border-crossing nature. Don't forget sunscreen and a first-aid kit.