Where is the road in beginning of the shining?

There are four hotels associated with your question, three real hotels and the fictional Overlook Hotel of the novel.

1) The Overlook Hotel: King mentions 'The Upland Highway' as leading to the town of Sidewinder, some 12 miles from the Overlook, and Dick Halloran is said to take Main Street out of Sidewinder after renting a snowmobile, but King never specifically states the name of the road from Sidewinder to the Overlook Hotel.

2) The Stanly Hotel: The hotel King stayed at when he first got the idea for The Shining is The Stanly Hotel in Estes Park, Colorado. This hotel is shown as the Overlook in the TV mini series version of The Shining. The Stanley is located at 333 Wonderview Ave.

3) Timberline Lodge: The hotel standing in as the Overlook in Stanley Kubrick's 1980 theatrical version of The Shining is Oregon's Timberline Lodge located outside Portland on Mount Hood. Timberline Lodge is located at the end of Timberline Rd.

4) The Ahwahnee Hotel: Though Timberline Lodge is the outside of the Overlook in Kubrick's The Shining, the inside are sets designed after the interior of this Yosemite National Park resort hotel. The Ahwahnee Hotel is located inside the park at 1 Ahwahnee Rd.