No, it is not possible for a human to walk the distance to the Moon within a lifetime. The average distance from the Earth to the Moon is about 384,400 kilometers (238,900 miles). Even if someone were to walk continuously without rest, it would take an incredibly long time to cover such a vast distance on foot.
Let's consider an average walking speed of 5 kilometers per hour (3.1 miles per hour). At this pace, it would take roughly 77,000 hours to walk a distance of 384,400 kilometers. Assuming a person walks for 8 hours a day without any breaks, it would take more than 9,600 days to cover that distance. This is equivalent to over 26 years of non-stop walking.
Additionally, it's worth noting that the Earth-Moon distance is not a flat, straight path. It is an average distance that varies due to the elliptical shape of the Moon's orbit around the Earth. So, even if we ignore the physical limitations and assume a hypothetical scenario where a person could walk in space, the changing distance and the lack of a solid path make it unfeasible for a human to walk to the Moon within a single lifetime.