Oak Cliff Earth Day returns to Lake Cliff Park on Sunday, April 14, and this year’s event includes a 5k race.

Run for the Environment starts at 9:30 a.m., and the Earth Day festival starts at 11 a.m. Early registration for the 5k run and 1-mile walk costs $25 and runs through March 15. After that, it goes up to $30.

The last day to register a vendor booth at discounted rates is March 19. They cost $30 for nonprofits and $55 otherwise. After the 19th, prices go up to $55 and $80.