I think the photos being taken by various folks from the ground only give half the story. Using Google Earth allows you to fly up above the area and look around.
I took a graphic from the developer's website and overlaid it upon the area so it is easier to get an idea of the development plan. The red lines are the hiking trails. The white line encompasses the entire Oak Grove property. I didn't get to it yet, but the southern most border of the Oak Grove property is the same line as both the Pleasanton and County Urban Growth Limit line. The peaks and primary ridgelines of the SE hills lie outside of this border.
I put placemarkers at certain areas to get an idea of the height around the area. The elevation in Google Earth is "mean sea level". For example, the elevation of the land at Stanley Blvd is about 350 ft above MSL and the highest Oak Grove lot is 790 ft. Subtracting those numbers means that if you stand at Stanley Blvd and look up, the highest Oak Grove lot is about 440 ft above you and the highest Kottinger Ranch lot is 396 ft above you. Not a big difference.
For comparison, the top peak in the Pleasanton Ridge area is over 2000 ft above MSL (practically twice the height of the peaks in the SE hills).
