What makes Porchfest different from a festival with a stage and a fence is that it's genuinely distributed — you're walking a few blocks in any direction and stumbling into a different act every hundred feet. Past years have run the spectrum from bluegrass to cumbia to indie rock to brass bands. Ninety-plus acts means you will not run out of things to hear, and you will also definitely miss most of them. That's the format.

Practical notes: This is a walking event, not a parking event. BART is your friend — check the schedule for the neighborhood once it's announced and plan accordingly. Bring cash for the food trucks and pop-up vendors that set up along the route. No wristband, no gate, no age restriction.

If you've got two hours: Pull the map the morning of, pick a six-block radius with the highest density of acts, and walk it slowly. Don't try to hit everything. The best Porchfest afternoon is the one where you stop somewhere unexpected and stay twenty minutes longer than planned.