As the day grows long and the sun sets daylight will diminish and it gets dark a little after 7:00pm assuming good weather. That leaves almost 2 hours of walking and most of the walk was on the canal towpath. The towpath, in the final 10 or so miles, runs parallel to well-traveled roads but is still physically isolated with the canal separating the towpath from the mainland. So, walking can continue for several miles without the ability to cross over, it's oddly dark and isolated, yet very close to commercial areas such as Easton Avenue.
The main point for walkers that expect to make this