Marble Mountain is a great hike in all seasons and itís one of the few Sangres 13ers that has fairly easy access in winter. From your parking spot on the South Colony Lakes road, continue up the road (Photo #1) to reach the intersection of the Rainbow Trail - Photo #2. Leave the road and hike northeast up the Rainbow Trail - Photo #3 and Photo #4.
After you reach the crest of the ridge, turn right, leave the main trail and continue southwest up the ridge. Staying on the ridge, follow an open stretch (Photo #5) for a bit and climb a short, steeper pitch to reach easier terrain, near 10,300í. Iím lacking photos of the remaining hike to tree line, but itís straightforward: Continue southwest along the ridge crest to reach the top of Point 10,725í, descend slightly on the other side and continue along a more narrow portion of the ridge before exiting the forest, near 11,600í - Photo #6.
Ascend west to reach the edge of Marbleís northeast ridge (Photo #7) and continue (Photo #8, Photo #9, Photo #10 and Photo #11) to a flat area, near 12,200í - Photo #12 and Photo #13. The remaining route to the summit is obvious. Continue southwest up the ridge (Photo #14, Photo #15 and Photo #16) to reach the final pitch - Photo #17. From the summit, enjoy excellent views of surrounding 14ers and the rest of the Sangres.