One of our close family friends rides horses for the San Joaquin P.D. Mounted Unit. She keeps the horses in a field on their property, and recently they've wanted to build a smaller enclosed riding arena.
It only took 4 hours, counting planning. The fence panels had been laying scattered around the field for years. They had spent the last couple weeks stacked under the tree behind the CAT backhoe in the upper right corner after my buddy and I gathered them up.
It was boring but fun. Drive a post, check the level, bolt a panel to it, check the straightness, and repeat.
It was a beautiful day. Light breeze with a high of 79f. Only a little dusty.