https://www.nps.gov/yell/planyourvisit/fees.htm
从南门走的时候会穿过大提顿公园；
Entrance FeesVisitors entering Yellowstone's South Entrance will be traveling through Grand Teton National Park first; separate entrance fees are charged or Annual Passes may be used at both parks. The following passes are sold at all entrance stations and online through the Your Pass Now website.

7天门票
私家车 35美金/车
摩托车或者雪地摩托：30美金/车
步行，骑行 20美金/人

Seven-day Passes

Good for entry into Yellowstone National Park for seven days from the date of purchase.
Private, non-commercial vehicle:$35
Motorcycle or snowmobile:$30
Individual (by foot, bicycle, ski, etc.):$20/person

Annual Pass

年票 70美金/人 Yellowstone National Park Annual Pass:$70.00
Annual pass providing free entrance into Yellowstone National Park for one year (valid through the month of purchase). On a snowmobile, this pass admits the signer(s). When traveling by snowcoach or shuttle, this pass admits a signer and up to three additional persons (16 and older) for a total of four people.

Regulations & Exceptions

• All passes are non-transferable.
• All snowmobiles must be on a guided tour or permit.
• School groups and other bona fide national and international academic institutions may be eligible for an Academic Fee Waiver.
• Anyone age 15 or younger is exempt from paying entrance fees.
• Passes may be used for entry as defined on the back of the pass.
• Anyone traveling through the park for business or commercial purposes needs a commercial travel permit.

Non-Commercial Buses/Vans

Non-commercial groups (e.g. church groups, scouts) traveling in vehicles with a capacity of 16 people or more pay $20/person.
非商业团组，16人以上每人支付20美金/人；

Commercial Tours

Commercial bus tours pay fees based on the seating capacity of the vehicle. The following fees cover entry to Yellowstone:
商业运营车：
1-6座 25美金/车，每增加一人支付20美金/人
7-15座 125美金/车
16-25座 200美金/车
26座以上 300美金/车
Commercial Sedan (1-6 seats):$25, plus $20/person
Commercial Van (7-15 seats, regardless of occupancy):$125
Commercial Mini Bus (16-25 seats, regardless of occupancy):$200
Commercial Motor Coach (26 or more seats, regardless of occupancy):$300Commercial entry good for seven days as long as it's the same passenger group.
Federal Lands PassesFederal lands passes are accepted and sold at Yellowstone entrance stations.
Note about Winter Use in Yellowstone
On a snowmobile, annual/lifetime passes admit the signer(s). When traveling by snowcoach or shuttle, passes admit a signer and up to three additional persons (16 and older) for a total of four people.

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黄石公园不需要提前购买门票，提前买票价也不会便宜的。

国家公园通用的年卡价格80刀/车，按规定可以有两个持有者，分别需要在门票卡的背面签上与护照相符的姓名。在该年票的有效期内，其中一个年票持有者可以驾驶一辆7座以下的民用车，自由出入美国所有的59座国家公园。

卡的图案可能都不相同

如果你不使用这种国家公园年票，也可以每个公园单独买票，比如大提顿公园和黄石公园是通票，是25刀/车/7天，其他公园也大都在10~25美元不等，还有个比较人性化的规定，就是你可以把前面买的国家公园门票攒着，如果够80美元了，下一个公园的售票处会给你换一张年票的。


然后你年卡上签一个名，回来可以40刀再转掉，如果4个人一车同去，那就是每个人10刀可以玩遍所有国家公园了，想像一下这门票简直是便宜到欲哭无泪。
另外在公园入口处工作人员会看一下你的卡和护照，所以你卡上签名要和护照一致的，然后工作人员会给一份黄石的地图和一些报纸。



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不需要提前买门票，有那种黄石旅行年票会便宜，但如果只去这一次没有必要买那种，就在公园入口买就可以了，可以用7天~
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不用，直接过去就可以买，按车算好像
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