No other capital city gives you this. Take Line 1 of the metro to Tajrish, walk fifteen minutes, and you are on a mountain trail with several thousand other people who had the same idea. Hiking is the single most social activity in Tehran and the easiest one to join alone: the routes are busy, the etiquette is friendly, and the teahouses along the way are built for stopping.
Friday morning is the main event, starting early — serious walkers are on the trail by 6am, the rest by 8. Groups are everywhere and are usually happy to absorb one more person for a stretch of path. If you want structure, organised hiking clubs run weekly trips with transport into the higher Alborz, and the minibus is where the friendships actually form.
