The cow parades have begun. Traditionally called, in various regions, Alpabfahrt, Alpabzüge, Öberefahre, Désalpe, you can find these parades all over Switzerland. I just received a notification of the first one of the season happening in Appenzell this Saturday Aug. 19. They will continue on into the fall.
Dates are sometimes decided last minute as these are actually a part of the farmer’s yearly cycle of work and as such are not easily run according to a specific schedule. This is also why they might arrive in town later than expected, depending on how long it takes them to walk down from the alpine pastures, taking adequate rests along the way.
Every region has their own traditional dress - Appenzell in the very colourful red and yellow with flowers on the farmer’s hats but usually not on the cows, in the Berner Oberland the cows get the flowers, sometimes extravagantly so.
To find ones on specific dates it might be helpful to use the above German and/or French words when you search.
Many will be listed with Switzerland tourism and of course the local tourist office can also help you out.