Chiang Mai combines a walkable historic centre, a modern café and gallery district, and mountain country that begins beyond the city. A good itinerary separates neighbourhood time from the longer roads to national parks and villages.
The Old City is the natural base for temples, gates and Sunday Walking Street. Nimman has contemporary dining, coffee and nightlife west of the centre; the Ping riverside and Kad Luang market add a different local-food and trading atmosphere.
These districts are close enough to combine selectively, but market days and traffic matter. Build an evening around one area rather than crossing the city repeatedly for isolated recommendations.
Doi Suthep rises directly above the city and can fit into half a day. Doi Inthanon, Mae Kampong and other mountain destinations require their own road time; cool weather, rain and winding roads can make a compact map look misleading.
During northern haze season, consult Air4Thai before committing to viewpoints or strenuous outdoor days. Move museums, food and craft stops forward when visibility or air quality is poor.