Hiked this trail Aug 11. Our app recorded 6.2 miles RT from the upper parking lot/TH. It takes about 45 min-1 hr to drive to the TH from Westcliffe. You definitely need a high-clearance 4WD vehicle to drive the last 3 miles of the road to get to the upper parking lot and to get out of your parking spot (HA!) (we had to tow someone out of their spot because they were stuck). There is room for about 20-25 vehicles at the upper lot, and another parking area about a minute down the road. The lot was mostly full by 9am, and this is the busiest TH we've seen in the Westcliffe area. A bathroom is at the lower TH.
It is a typical CO trail and not anything too extreme or rugged. We had gorgeous weather and it was beautiful, varying scenery. Saw about a dozen ptarmigan. Also saw 4 horses along the trail, and some horse poop. Some remnants of wildflowers, but mostly dried out. No mosquitoes. Lots of views from Music Pass and neat bristlecone pines around the pass. The view of pointy Tijeras Peak was our favorite, and it also happens to be the backdrop of Lower Sand Creek Lake--just gorgeous! Some backcountry camping sites at the lake and good fishing! Many trout were swimming around as we ate lunch at the lake. Note: You do hike up in elevation and down and up again to get to the lake and then reverse to get back to the TH, so it can make for some "hot" climbing back up to Music Pass in the afternoon on your way back to the TH.

The above, posted directions for this trail are wrong. Here are the correct ones:
-Drive south on Hwy 69 for 4.6 miles
-Turn right on CR 119 (Colfax Ln) and drive south for 6 miles to a T intersection
-Turn left on CR 120
-After 0.2 mi, the road makes a sharp right and becomes CR 119
-Continue 5 miles to lower Music Pass TH
-Road (now 4WD) continues for another 2.5 miles and ends at upper Music Pass TH