Distance from Smithfield, Utah to Portneuf, Idaho
The driving distance from Smithfield, Utah to Portneuf, Idaho is 89.8 mi (144.5 km)
The straight-line (air) distance is approximately 44.4 mi (71.5 km)
Estimated travel time by road is 1 hour 26 minutes
We found 3 routes between Smithfield and Portneuf.
Available Routes
Route Directions
Get on I-15 N in Oneida County from UT-218 W, N 4800 W and ID-36 W
Follow I-15 N to S 5th Ave/W Portneuf Rd in Bannock County. Take exit 63 from I-15 N
Drive to N Fort Hall Mine Rd/W Portneuf Rd
Route Directions
Get on I-15 N in Box Elder County from UT-218 W, State Rte 142 E, Short Divide Rd and W 20800 N
Follow I-15 N to S 5th Ave/W Portneuf Rd in Bannock County. Take exit 63 from I-15 N
Drive to N Fort Hall Mine Rd/W Portneuf Rd
Route Directions
Journey Details
Traveling from Smithfield, Utah to Portneuf, Idaho covers 81.6 miles (131 km) in a northwest direction. This fast highway, substantial route typically takes 1 hour 18 minutes under normal conditions.
Drivers have 3 route options between these locations (82-94 miles / 131-151 km). The primary route shown here saves 13 minutes compared to alternatives.
The route features scenic views. During midday weekend travel, expect typical weekend traffic patterns with average speeds around 66 mph (106 km/h) .
Journey Waypoints
Smithfield
Starting Point
Portneuf
Destination
