Biking Directions from Lyon Village Shopping Center (Starbucks):

Take Custis trail toward Rosslyn. 

After sharp left at Lee Highway

After bridge over Rt 66, take next left on short path to 20th Road. 

Left on 20th Road.

Right on 21st St @ Stop sign.

Left on Taft (1st) at church

Right into Dawson Terrace parking lot. 

Alternatively,

Take Veitch St exit from Custis (on downhill before sharp left at Lee Hwy)

Left on Veitch St/21st St at stop sign

Cross over Rt 66

Left on Taft St (3rd) at church

See Arlington County bike map below.