Complex sentence: Access points along its length allow walkers to sample the Track as a series of short walks over some time and many people actually complete the walk over several months or years as a series of one-day or half-day walks.
Split into simpler sentences: Access points along its length allow walkers to sample the Track as a series of short walks over some time. Many people actually complete the walk over several months or years as a series of one-day or half-day walks.