Drive Temecula Valley yourself, with a GPS audio guide that plays automatically as you go. Your booking unlocks the whole region in the free Wine Trails app: pick your date and starting point — Old Town Temecula on Front Street or Temecula Wine Country on Rancho California Road — choose the cellar doors you want, and the app builds your personal route with turn-by-turn narration. 37 narrated stories cover 19 cellar doors across Rancho California Road, De Portola Road and the Calle Contento trail: as you pass Callaway you'll hear how textile executive Ely Callaway founded the valley's first bonded winery here in 1974 and made his name with Chenin Blanc. No group, no schedule, no guide — pause for a long lunch, replay anything, and the audio keeps working when the signal thins out east of the vineyards. You'll need a car and a designated driver; tastings are booked and paid directly with the wineries.