From the Bourne Bridge (the one that connects with Route 25):
After crossing the bridge onto Cape Cod, you will immediately encounter a rotary. Go 3/4 the way around and take the exit for Route 6A East (also known as Sandwich Road or the Old King's Highway). After 3 miles, turn right and go up a hill at the intersection with the signs pointing toward Route 6 East, which is also known as the Mid-Cape Highway.
Then you just merge with and stay on Route 6 for approximately 46 miles until you see Olivers' sign on your left.
One thing to remember is that you will encounter a rotary after about 36 miles on Route 6 - just go 180 degrees (halfway around) and continue on Route 6 East - Olivers is only 10 miles beyond that.

FROM PROVINCETOWN and TRURO:
Just head West on Route 6 and go past the exits for Wellfleet Center. Olivers Red Clay Tennis Courts will be on your right. Olivers is about 20 minutes from Provincetown and 10 minutes from Truro.