3 days · Tepoztlán + Cuernavaca
Straight answer on the worry: Morelos has had rough patches, and the honest move is to check the current advisory for the specific highway you are taking before you leave, not to pretend it does not matter. That said, the Tepoztlán–Cuernavaca corridor is one of the most traveled weekend routes out of Mexico City, busy with families the whole time. Drive it in daylight, stick to the toll road, and you are on well-worn ground.
Days 1–2: Tepoztlán
Tepoztlán is a pueblo mágico an hour south of the capital, wedged under jagged cliffs. The main event is the climb to the Tepozteco pyramid — a steep, sweaty hour up stone steps that will humble you if you skipped breakfast. Go early, before the heat and the crowds. Back in town, the market threads through the center; midweek it is a real local market, Sundays it is a slow-moving river of day-trippers. Book a temazcal if you want the sweat-lodge experience — treat it as a genuine ceremony, not a spa add-on, and tell the guide about any heart or pressure issues beforehand.
Day 3: Cuernavaca
The hop to Cuernavaca is short, barely 45 minutes through the hills. Cuernavaca is bigger, hotter, and less charming than Tepoztlán — the “eternal spring” city has grown into real traffic. Come for one specific thing: the gardens, the Borda grounds, or a balneario to swim off the last day. Do that, eat lunch, and move on. It works as a half-day cap, not a destination you linger in.
What a friend who lives here would tell you: do not do this on a Sunday. Tepoztlán on a weekend is bumper-to-bumper from the highway exit, parking turns into a scavenger hunt, and the town you came for disappears under the crowd. Take a Tuesday or Wednesday and it is a different, quieter place.