Tepic is not one of Mexico's showy colonial cities, and it should not be sold as one. It is the capital of Nayarit, a workaday regional city in a green valley between the Sierra Madre Occidental and the Pacific coast. Most travelers pass through on the way to San Blas, Sayulita, or Puerto Vallarta.
There is still enough here for a worthwhile day if you are nearby. The Museo Regional de Nayarit is the strongest reason to stop, with expressive shaft-tomb ceramics from western Mexico that feel very different from Maya or central Mexican art. Nearby, the Centro Estatal de Culturas Populares e Indigenas points toward the living Cora and Huichol cultures of the Nayarit highlands.
The historic centre is pleasant rather than grand. The cathedral, plazas, government buildings, and old houses give Tepic a real city centre, while Sierra de San Juan rises on the edge of town for a green hike and a view back over the valley. Tepic earns a page because it helps make sense of Nayarit beyond the beach towns, not because it demands a long stay.