In honor of Martin Luther King Jr. Day, Joshua Tree National Park, along with the country’s 400 other national parks, will waive its entrance fee on today. Camping fees will still apply. Entrance fees are $15 for a vehicle, good for a week; $5 for bikers and hikers; or $30 for a year pass. Military, seniors, the disabled, and volunteers are eligible for free or discounted passes. For more information, call the Park Service at 760-367-5500.