My run of the San Juan Solstice 50 or SJS50 on June 24th, 2017.
The experience was incredible, the views were epic and the aid station volunteers were the best I have seen yet.

Here is the course description from the website http://sjs50.com/courseinfo.html

Segment 1 Alpine Gulch: From the town park, up Engineer Pass road for 2.7 miles. Water refill here, if you want. Left and S up Alpine Gulch trail. Way up! Aid is five miles up, just below tree line. Seven creek crossings before East Alpine guarantee that you will get wet. Please remember that the aid is not at the top of the climb! From aid, proceed up and SW to huge saddle. Turn hard right, NW, and go all the way up until the ridge flattens out somewhat. Traverse generally W until the obvious descent into Williams Creek. Don’t descend off the high ridge until you see the obvious trail. Emerge at aid #2, 15.7 miles, in the Williams Creek Campground on the Cinnamon Pass road. Cutoff at Williams is 10AM.

Segment 2 Carson: Go W up County Road 30 for 2.5 miles, turn S onto Wager Gulch jeep road, and go way up, 3.6 miles to aid #3, 22 miles, at just below Carson ghost town. Cutoff at Carson is noon.

Segment 3 The Divide: Head S up the jeep road to the Divide, turn hard E and then NE, and go for Coney Peak, along the Colorado Trail (CT). From here until mile 35, you’ll be on the CT. Along the Divide, stay left if ever in doubt. This segment is 9 miles long, so carry plenty of water and food. Be vigilant and watch those clouds. If it goes electric, get off the ridge! You may parallel the trail from the underside, either N or S, along this section, should the weather become untenable. Keep your eyes open for a left turn toward the yurt and aid at mile 31.

Segment 4 Sawmill Park: Continue E along CT, which becomes a jeep road. Turn left (N) at Rambouillet Park (the first large intersection of jeep roads mile 35) and, within about a mile, begin descending NE. Emerge on the Slumgullion Pass Hwy 149 road at mile 40. Aid station # 5 is here. Cutoff at Slumgullion Aid Station is 6 PM. You will cross the highway here and descend via a trail, NOT the pavement! Please watch for cars when crossingthe road is open to traffic.

Segment 5 Vickers’ Ranch: Run down a trail segment for one mile, then turn right (E and up) onto a trail going through BLM onto private land. NOTE: Please don’t train on this section, and please be REALLY courteous to people you might meet or cows that might chase you. This family usually does not let the public onto their land. We would like to maintain the great relationship that we have going with the Vickers.

This first hill in the Vickers is a doozy, heading up 1,700’ to 11,000’, so be ready for it! There's some bushwhacking, and you have to pay really close attention to the markers; if some are down, eaten, or trampled by cattle, then figure that the loop is cruising up NNE to just under the big rise you see, called Mesa Seco, at which point you’re heading N, connecting some trails, jeep tracks, and various amounts of bushwhacking, so that you end up at one of the highest pastures. Aid here at mile 46+. From this aid station turn left and merge with the Waterdog Trail. One mile down you'll turn right into the aspen trees, and now it’s a nobrainer but a quad burner ( steep and rocky) down to town for 2 miles. When you emerge into the residential area, follow the markers to the 5th St pedestrian bridge, and use 5th Street to cross over Hwy 149 to Silver Street. Only two blocks back to the park!