All the way is paved. Coming from the cost you will go up to 4818 m which is named Ticlio.
When you come to the town of La Oroya, just after the railwaystation you turn to the left, afterwards in Las Vegas (km 196) stay on you right side going up again to 4000m, then goint down and you will arrive in Tarma (3050 m).
Just stay with the Carretera Centran and 10 min behind Tarma (= 6 km from the Plaza de Arma) km 39 on your left hand you enter our Hacienda La Florida.
Roadmap to Tarma from the town of Lima
he following map shows the complete road from Lima – San Isidro, Parque Olivar, up to the Hacienda La Florida in Tarma.
Beautiful scenery is something permantente on his trip to Tarma