MD 418 heads northeast as a two-lane undivided highway through farmland.

The state highway intersects MD 64 (Smithsburg Pike) just west of the unincorporated village of Ringgold.

The highway continues north as SR 2007 (Midvale Road) toward the unincorporated village of Rouzerville.

[3][4] The state highway was extended northeast to the Pennsylvania state line around 1956, the same year the highway's present alignment at its western end was constructed in conjunction with MD 60's bypass of Leitersburg.

[5][6] MD 418 was reconstructed from the eastern end of the bypass of Leitersburg to the state line in 1958, including the construction of the highway's present alignment through Ringgold.