There are 1,725.89 miles from Grafton to Portola Hills in southwest direction and 2,077 miles (3,342.61 kilometers) by car, following the I-70 W route.
Grafton and Portola Hills are 1 day 6 hours far apart, if you drive non-stop .
This is the fastest route from Grafton, WI to Portola Hills, CA.
Please note the time difference between Grafton, WI and Portola Hills, CA is 2 hours. The current time in Grafton is 5:01 am and the current time in Portola Hills is 3:01 am.
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