What's the main difference between "hike/hiking" and a "picnic?"

Native speaker’s answer
Rebecca
The difference between a "hike" and a "picnic" is that a "hike" requires physical activity. It's the activity of going for long walks in nature or up mountains, whereas a "picnic" is sitting down somewhere, usually in nature or a park on a blanket, and eating food and snacks. Ex: We hiked up the mountain and then had a picnic at the top. Ex: I'm not fit enough to go hiking at the moment. Ex: I love going on picnics! Especially if there's wine.