Complex sentence: The trail climbs the peak from the east slope from the South Colony Lakes basin, a popular site that is also the base for most climbs of Crestone Peak and Crestone Needle.
Split into simpler sentences: The trail climbs the peak from the South Colony Lakes basin, accessed from the east side of the range. This basin is a popular site that is also the base for most climbs of Crestone Peak and Crestone Needle.