Jogged and walked partway to Monte Alban, passing through some parts of town where breathing was unpleasant. But the destination was fresh.
After wandering there for a while, I found a wee trail leading from the smaller ball court near the first carpark out along this ridge.
Found a way from there to the trail heading around the right of the next ridge.
Looking back up the valley. Trails were all wonderful, just had to stop occasionally to pull some spiky stuff from my socks.
From there, re-entered civilisation via dirt
road into some slightly slummy area (intersection of zapotecas and donaji, nothing unpleasant.
Bought a drink, jogged down until the pollution overpowered, hopped on a bus back into the centre, had a good meal and a couple of glasses of watermelon juice. Yum Yum.