Looking to save a few bucks? The National Park Service is waiving entrance fees at all national parks, including Yellowstone National Park and Grand Teton National Park, on Tuesday, June 21.

A seven-day pass to Yellowstone and Grand Teton National Parks is normally $25 for a private, noncommercial vehicle. The entrance fee waiver does not include other fees such as those charged for camping, reservations, tours and use of concessions services.

All park roads, lodging, and stores are open for the season, as are most of Yellowstone's campgrounds. You can see a full list of 2011 opening and closing dates here.

Additional fee free days in 2011 are National Public Lands Day on Saturday, September 24, and the Veterans Day weekend, November 11-13.

----

Keep up with what's happening in Yellowstone by signing up for the free weekly Yellowstone Insider newsletter. Subscribe today! More details here.

Follow Yellowstone Insider on Facebook! Click this link to go to our Facebook page, which features story updates.

We've also set up a free Twitter account so you can receive updates on the device of your choice.