 The first eastward extension of MD 298 was when the highway from MD 292 to MD 566 was constructed as a gravel road in 1951 and 1952.The portion from MD 566 to US 213 was constructed around 1946 as part of MD 566, which was widened to starting in 1953.MD 298 was extended east to US 213 along part of MD 566 in 1963 to form a continuous route between MD 20 at Fairlee and US 213 at Harmony Corner.