Are we there, yet?
Sure it's safe. If you tend towards insanity try back-to-back races on the weekend or a runner's triathlon or pentathlon where you run 3 or 5 races of varying distances from 200m to 10K in one day.
2024 Races:
03/09 - Livingston Oval Ultra 6-Hour, 22.88 miles
05/11 - D3 50K 05/25 - What the Duck 12-Hour
06/17 - 6 Days in the Dome 12-Hour.