The Saxetbach is a mountain river south of Interlaken in the Canton of Bern, Switzerland. It is a left tributary of the river Lütschine. It flows through the village Saxeten and joins the Lütschine in Wilderswil. It forms a narrow ravine, the Saxetbach Gorge.

On 27 July 1999, there was an accident in the Saxetenbach Gorge, just above the village of Saxeten, in which 21 young people from Australia, New Zealand, England, South Africa, and Switzerland died. 48 people from 2 coach tour parties had opted to do a side activity of canyoning where you float, swim and climb through an area, such as a gorge. It was organized by Adventure World, a now defunct company who were located in Wilderswil, not far from Saxeten. Shortly into the experience, flash floods swept through the gorge, resulting in the deaths of 21 people in the group. 18 were tourists and 3 were canyon guides. The authorities were alerted to the incident when a local jogger spotted bodies in Lake Brienz.

The survivors were rescued and then questioned by Swiss police before being released and returned to their hotel at 1am the next morning. Identifying the dead bodies was a challenge as many were badly traumatized, and bereft of personal belongings as jewellery, watches and identifiers were removed before undertaking the experience. A number of survivors opted to identify the dead at the mortuary, but many had to be identified through DNA and dental analysis. Around 150 officers were involved in the operation. It was Switzerland's worst whitewater accident since 1993 when 17 people died in an accident in the Graubünden region.

Following the incident, there was significant criticism of the organiser Adventure World, noting their ignorance toward the storm warnings issued. Swiss authorities were quick to blame profit making and general negligence as the cause of the accident. The Swiss government also suspended all canyoning expeditions until a full investigation had taken place. A permanent memorial was opened between Wilderswil and Saxeten in July 2000.

In 2000, Adventure World ceased trading following an incident where an American tourist was killed in a bungee jumping accident. In December 2001, eight staff at Adventure World, including managers Felix Oehler and Bernhard Gafner were tried for manslaughter in connection to the deaths. Of the 8 staff trialled, six were found guilty of manslaughter through culpable negligence and given suspended sentences of between two and five months and fined between 4,000 and 7,500 CHF. Two tour guides were found not guilty, the judge declaring it was not their responsibility to cancel the excursion.

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  Saxetenbach disaster memorial
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  Messages left by family and friends at the Saxetenbach disaster memorial
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  The Saxetenbridge across the Saxetbach connecting the walkway to Wilderswil
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  The Saxetbach joining the Lütschine

• A storm in the distance an Outside Magazine article about the canyoning accident.