Bullion King Lake is a high alpine turquoise lake at an elevation of 3.832m (12,572ft) above the sea level, located in San Juan County, southwest Colorado, in United States. This trail is well worth the drive; however, it is steep in places and has a limited number of places to pass other vehicles. It's one of the highest mountain roads of Colorado.
Be sure to have experience in back roads if you attempt this trail. The road to the lake is called Forest Road 822 (also known as Porphyry Gulch Road or Bullion King Lake Trail). Avoid driving in this area if unpaved mountain roads aren't your strong point. Stay away if you're scared of heights. It is recommended that beginner riders avoid this road. It’s a 2.9 mile long drive starting off Million Dollar Highway. Only 4WD vehicles. This is not for the faint of heart. Part way up there is a sign that says "Rough and dangerous road ahead, travel not recommended". This refers to a narrow spot against a ledge a few hundred feet ahead. It will make you a bit anxious the first time through, but it is really wide enough. The surface of the rough road is gravel and bumpy with embedded rocks. With such a high summit altitude the road can be closed anytime due to snowfalls. The zone is prone to heavy mist and can be dangerous in low visibility conditions. The road is very narrow, steep, and with several tight switchbacks. The trail has steep drop offs that are scary for a novice. There are several ruined mines along the drive.
The road is totally impassable from October to June. It’s a real challenging road and a true test of your vehicle and your stamina because the road abounds in twists and turns with wheels sometimes hanging above the precipice. The road is very steep. It’s a hairy ascent to the magical lake in the basin above.