The cache is NOT at this location. It is a number of Km away, but is at an ONroute! (That's a clue for the final!)
This is a Bonus Cache for the Adventure Lab called 'North and South Bound on the 400". The icon for the AL is also found at the King City ONroute. When you load it, you will also find there is a 'post' for the AL at this ONroute.
The Adventure Lab is easy to accomplish. You only have to visit all (both north and southbound) the ONroutes on the 400 Highway. The questions to complete the AL are easy to answer and are a good way to involve the smaller geocachers of our group. All the answers can be done from your vehicle!
As you answer the questions, you will receive part of the co-ordinates to where this Bonus Cache is. Either write them down or revisit the logs for each post after you have completed the Adventure Lab.
The area where the final is located may be closed for part of the year put is usually still accessible. (That's another clue.)