interstate 210 (i-210) and state route 210 (sr 210) are two connected highways in the los angeles and san bernardino counties of california. they are also known as the foothill freeway together. it runs from the interstate 5 near santa clarita and san fernando to san dimas at the state route 57. here, it becomes state route 210 and continues east, ending at the interstate 10 in redlands. together, the highways are about long.