Excavations on the N4 Collooney to Castlebaldwin road scheme were carried out by Irish Archaeological Consultancy Ltd on behalf of Sligo Co. Co. over a one year period between 2016 and 2017. The excavations were undertaken within the footprint of the proposed realignment of the N4 between Doorly and Castlebaldwin. The route, although traversing generally poor and marginal ground, produced evidence for a wealth of archaeological activity dating from the Neolithic period to modern times. This took the form of stone tool deposits, burnt mounds, hilltop enclosures, burials and an augmented relic stream bank.The excavations were directed by Bruce Sutton, Dave McIlreavy, Brian O’Hara and Lydia Cagney. Post-excavation works are at an early stage but considering the wealth of archaeological remains in Sligo the results should make a considerable contribution to our archaeological knowledge of the area.Shane Delaney is an archaeologist and project manager. He is a graduate of UCC where he achieved his BA (Hons) and MA in archaeology. Shane has been working in field archaeology since 1995 and has worked throughout the country. He has directed sites from most periods and has managed many largescale archaeological projects over the years. He managed the N4 archaeological works for Irish Archaeological Consultancy Ltd on behalf of Sligo County Council and Transport Infrastructure Ireland (TII).