Team Sky's Wiggins, whose victory on stage two gave him a 44-second advantage over the Australian, finished ninth on the hilly 174km stage from San Jose to Mount Diablo.
Italy's Enrico Battaglin finished second behind Lotto Belisol rider Hansen on the hilly stage from Marina di San Salvo to Pescara, with compatriot Danilo Di Luca in third.
Coaches have became more calculating, deploying their best runners on the second and longest leg, and others strategically on the hilly legs.
Gebremariam earned $7,500 for taking first and a $20,000 bonus for breaking the record on the hilly course.
Gebremariam won on the hilly course in 35 minutes 2 seconds, while Kiplagat claimed her title in 26:13.
Fernandez appeared to labor on the hilly stretches of the course, but still managed to cross the finish line in fifth place in 32 44.
Castroneves, driving a Reynard-Honda for Team Penske, led all but 2 of the 83 laps on the hilly 2.238-mile 2.238-mileircuit -- giving up the top spot to Juan Montoya during the first round of pit stops by the leaders.
Farming is diversified (rice, corn [maize], copra, abaca) on the hilly, rolling land.
