 During this journey a few lakes are made, including Rapley Lake and just below a private lake with weir in royal Bagshot Park.This stream goes straight eastward until before the M3 turning ESE; the Bourne becomes named the "Hale Bourne" when this joins from the southwest, then heads due east.In a hilly, well-wooded strip of public heath adjoining the off-limits Pirbright Ranges Heath to the south, in Lightwater, the Hale Bourne springs which forms a small lake, Lightwater, surrounded by houses and its flow turns east when it takes on a greater amount of water from the Windle Brook below Broadway Green, Windlebrook and Rectory Farms in Lightwater; then this enlarged Hale Bourne flows into Chobham where it becomes joined by a tributary and known as the Mill Bourne.