This is one of my mainstays.
Pick five different objects, carry each for 100 meters, and repeat for two rounds – one kilometer of non-stop fun.
Bonus points if you wear your ruck throughout.
Today was two sixty pound sandbags, two cinder blocks, a 110-pound sandbag, the yoke with a 25-pound plate dangling from each side, and two 24 kg kettlebells.
After my five rounds were done, I took the Odyssey Log for a few trips, too.