From Chaweng: Take the 1st right hand turn before Buddy Resort (Tamarind Springs road, there is a Family Mart on the corner). Follow that road for 5 km, past the golf driving range, and keep going until the concrete road comes to an end. Do not turn right to go up the mountain. The Lager site is at this T-junction.
From Nathon: Take the 1st left hand turn after Buddy Resort at the Family Mart. The rest as above.