MD 144 curves around the quarry and rejoins the side of I-68 as the highway passes West Wilson Road and crosses a tributary of Flintstone Creek. The state highway leaves the freeway and passes through the unincorporated village of Flintstone, where the state highway intersects the Exit 56 ramps to and from eastbound I-68 and Black Valley Road, which leads to ramps for westbound I-68. MD 144 joins I-68 and Flintstone Creek in passing through a gap in Warrior Mountain. Gilpin Road, an older alignment of US 40 that is designated MD 144AE, begins to parallel the eastbound side of the state highway at Town Creek Road. The two surface highways cross Town Creek and begin to climb Polish Mountain, with MD 144 following a gentle curve while Gilpin Road follows a winding alignment. MD 144 intersects Gilpin Road as the highway begins the descent from the mountain. MD 144 and I-68 follow Pratt Hollow east between several ridges. The state highway crosses the freeway and over Pine Lick Hollow and closely parallels the westbound direction of I-68 before reaching its eastern terminus at US 40 Scenic (Old National Pike) just north of I-68 Exit 62, just west of Fifteen Mile Creek, and on the edge of Green Ridge State Forest.