For the 2nd kilometer, the donation will be $10 * 2 = $<<10*2=20>>20.
For the 3rd kilometer, the donation will be $20 * 2 = $<<20*2=40>>40.
For the 4th kilometer, the donation will be $40 * 2 = $<<40*2=80>>80.
For the final kilometer, the donation will be $80 * 2 = $<<80*2=160>>160.
For the entire race the donation will be $10 + $20 + $40 + $80 + $160 = $<<10+20+40+80+160=310>>310.
#### 310