The distance from Grass Valley to San Francisco is approximately 140 miles. Driving is the most practical mode of transport, taking about 2.5 to 3 hours via I-80. The route takes you from the Sierra Nevada foothills through the Central Valley and into the Bay Area. Traffic can be heavy, so plan accordingly.
Total Distance: 225 km driving, 190 km air distance.
Traffic can be heavy near the Bay Area during rush hour.
Spring and fall for pleasant weather.