Runners, cyclists, walkers and ritzy San Francisco Yacht Club daytrippers all flock to Dynamo’s donut and coffee fueled kiosk by the bay. It’s easy to justify a pre- or post-activity stop. Just order at the window, grab a seat along the stone wall, and enjoy.

Sure, the lime green and yellow sign at the newer Marina kiosk encourages visitors to “Make it a bacon donut day,” but other rotating offerings proved even more tempting. Sara Spearin’s team crafts featherweight raised donuts with pleasant chew, and also produces surprisingly light cake donuts. Complementary flavors are at the mercy of the seasons and the creativity of the Mission District donut kitchen masterminds. Four Barrel Coffee co-stars at Dynamo, just as Dynamo donuts co-star at Four Barrel’s Mission District flagship.

Of course I visited Dynamo two days straight. Why not when you’re within striking distance?

My first Dynamo encounter included raised Ginger Orange Donut ($2) with good chew.

Their Strawberry Earl Grey Donut ($3) was a surprisingly light cake counterpoint.

Dynamo staffers swapped out wood menu tiles on Sunday, so I indulged again.

Caramel de Sel Donut ($2) was a raised masterpiece with a sweet backbone and savory finish.

My weekend’s sweet-tart exclamation point involved cornmeal rosemary cherry cake ($3).