Crossroads

Camperdown parkrun is run over a one-lap figure-eight course - this is the crossover point. 1 km from the start we cross from right to left and down; after 3 1/2 km we come down the path on the left by the daffodils and off bottom right.
Both these bits being downhill means there's also some uphill...
Today I did some hill training - 1 min hard up, 1 min jog down, repeat till your legs join your lungs in crying for mercy.