It is illegal to kiss in a public park after sunset.

The Law Explained

In the historic mining town of Butte, old decency laws made it a municipal violation for couples to engage in public displays of affection, such as kissing, in parks after the sun went down. This was part of a broader effort to crack down on the town's notorious rowdiness and wild nightlife during the copper boom. Today, it is entirely ignored by starry-eyed locals.