You can apply online for a Senior Pass (it costs $20) here: 2016 Senior Park Pass
Here's the quote from StevenT I just read at the Tearjerkers website:
Senior Pass increase coming
Postby StevenT » Thu Dec 22, 2016 6:52 pm
I just saw this on another forum and thought I would post it in case anyone wants to save on an annual pass. You must be 62 or older.
The House of Representatives just passed HR4680 http://tinyurl.com/zo2hl6f that will, if the Senate passes it, change the $10 lifetime Senior Pass to cost the same as the annual America the Beautiful Pass, which is currently $80 for a year. The companion bill in the Senate is S2257 - http://tinyurl.com/h582fdb .
Both bills have bipartisan support so the legislation could be on the President's desk by the end of the week, and probably be signed and effective immediately.
Since it was in the law that current Senior Passes are good for life, the one you have will probably still be good. But if you don't have one yet, now is the time to buy at the $10/life rate. You can get one at a National Park, at offices of the USFS, BLM and BOR, at some NWRs, and at USACE (COE) rec sites.
You can also buy one using the USGS online store, but hurry. See: https://store.usgs.gov/pass/senior.html . Applicants must fill out the Online Application and upload proof of residency and age. This may be done by photographing your document and uploading it to the order. You will need to provide a credit card payment of $20.00 ($10.00 fee for the Senior Pass, and an additional $10.00 document processing fee). Once the documentation is verified and payment is received, a pass, with the pass owner’s name pre-printed on it, will be issued to the applicant. If you cannot order a Senior pass online, you can submit a Paper Application by mail to the USGS using the paper application and enclosing the same documents and $20 fee.
Recreation Fees and Passes information from the US Forest Service. Buying your Senior Pass in person reduces the cost to just $10 (if you do it before the big cost increase).
Interagency Senior Pass
Cost
$10 Lifetime
Who Qualifies
Must be a citizen or permanent resident of the United States.
Must be 62 years of age or older.
Must obtain in person.
Must show proof of age, which may be a state driver's license showing birth date, a birth certificate, or similar document.
Benefits
Honored nationwide at all Forest Service, National Park Service, Bureau of Land Management, Bureau of Reclamation, and US Fish & Wildlife Service sites charging entrance or standard amenity fees.
Valid for pass holder's lifetime.
Admits pass holder and any accompanying passengers in a private non-commercial vehicle.
At per-person fee areas, admits pass holder and up to 3 persons. Persons 15 and younger are admitted free of charge.
Receives a 50% discount on some expanded amenity fees like campgrounds (does not include hookups for water/sewer/electricity), highly developed boat launches and swimming sites and for specialized interpretive services.
Generally applies to:
Single family campsites
Highly developed boat launches or swimming sites
Guided tours, movies and seminars (pass holder only)
Does not apply to:
Additional campsites not occupied by pass holder
Flat fee for a group campsite
Separate fee for utility hookups
Display
At staffed sites, show your pass to the booth attendant.
At unstaffed sites, use hangtag to display pass from rear-view mirror. Hangtags are available wherever you purchase a pass.
At per-person sites, present pass upon request.
Other Important Details
Nontransferable.
Belongs to the signer only and s/he must be present for the pass to be used. Photo identification may be requested to verify pass ownership.
Concessionaires may or may not honor this pass, according to the terms of their current permit.
Pass holders receive a 50% discount on some expanded amenity fees.
Decals may be issued free for open topped vehicles at unstaffed sites. Decals are only valid when the owner has an accompanying valid pass.
Are not valid for any special recreation permits.
How to Obtain a Pass and Hangtag
Available online at http://store.usgs.gov (link is external) or at most national forest or grassland offices. Passes purchased through USGS have an extra $10 processing fee.