National Park Week starts on Saturday, April 21st and runs through April 29th — that means that Lake Mead National Recreation Area will be waiving their entrance fees, as will the other 100+ national parks that usually charge entrance fees.
Lake Mead National Recreation Area has a page on the National Park Service’s website that will give you all sort of fun info on exploring the park, history & culture, nature & science, etc. – so you can check that out by clicking here. Enjoy!