Simplify the following text for a Grade 4 native English-speaking person.
Original: It is situated to the east of the Yass River , about 16 k north of Sutton , about 15 k west of the Lake George range .
Simplified: It is built near the Yass River . Gundaroo is about 16 kms north of Sutton and about 15 km west of the Lake George range .