An activity is a log of the route you take while using Navigator in the AllTrails app. You can also import past routes into your activity list from AllTrails.com — here's how.
Your activities are tied to your account, so you can view your list from any device.
Any activities you log that are linked to a trail will automatically be viewable by other members on the trail page, unless your activities have a default privacy of 'Followers only' or 'Only me'. Additionally, you have the option to make any individual activity private — learn more here.