If you’re a senior citizen who likes to visit national parks, there’s a deal you should know about before it’s gone.

The National Park Service is boosting the price of a lifetime pass for seniors — known as the America the Beautiful, National Parks & Federal Recreational Lands Senior Pass — from $10 to $80 on Monday, Aug. 28. In some local spots, Friday may be your last chance to get one before the price hike.

The pass is good for entry at any of the Park Service’s 2,000 recreational sites, including the Angeles National Forest.

It’s the first time since 1994 that there’s been an increase in the cost of the Senior Pass.

Officials say the additional revenue will be used to “enhance the visitor experience in parks.”

If you hold a current lifetime pass, it will remain valid. All benefits of the current Senior Pass stay the same, according to the National Park Service.

You can purchase a pass online, by phone or at a federal recreation site.

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In some places, like the Los Angeles River Ranger District Office at 12371 Little Tujunga Canyon Rd. in Sylmar, this Friday (Aug. 25) will be your best shot at buying a pass in person for $10.

The office is closed Saturday and Sunday.

Friday’s hours are 8 a.m. to 4:30 p.m.

But you can still buy a pass online at www.usgs.gov/senior-pass or by phone at 888-275-8747.

Low-income seniors can buy a lifetime pass for $20 a year for four consecutive years. Then the lifetime pass benefits will kick in.

If you buy online, officials recommend printing out your order confirmation and using that as your pass — with a photo I.D. — for the time being until the pass arrives in the mail.

U.S. citizens or permanent residents 62 years or older are eligible for the Senior Pass.

The price of an adult (non-senior) annual pass is $80.

The Park Service also has other passes, such as free passes for U.S. military personnel and free passes for fourth-graders.