A thousand young people left a mountain pasture in the Vaud Jura unsuitable for grazing after an illegal rave.
Police negotiated with organisers to end the party on Sunday morning, avoiding a risky overnight intervention.
The municipality of Ballaigues has filed a criminal complaint.
While organisers say they cleared the site, the farmer says trampled grass means his cows have lost their summer pasture.
Govt looks to cut forest protection
The Federal Council is scrapping the CHF 25 million a year that Parliament voted to help forests adapt to climate change, despite two clear parliamentary decisions.
Federal Councillors heckled by protestors
Federal Councilors were out across the country marking National Day on Saturday - but not without controversy.
Further pressure on Swiss football head
Pressure is mounting on Zurich-based FIFA and its Italo-Swiss president Gianni Infantino after North America's football body demanded a complete overhaul of his presidency.
Politicians carry stereotypes
Elected politicians in Switzerland carry more gender stereotypes than the voters they represent, a new University of Geneva and University of Lausanne study finds.
More Swiss firefighters head to France
A second team of 33 firefighters from French speaking Switzerland will travel to south-western France this weekend to relieve colleagues battling the wildfires.
French wildfire smoke drifts
Smoke from the wildfires ravaging south-western France has drifted into Switzerland, the federal weather service MétéoSuisse says.
