# Special Regulations; Areas of the National Park System, Yellowstone National Park
> **National Park Service** · Final rule. · Published 2011-12-12 · Effective 2011-12-15 · 76 FR 77131
## Document
- **Document number:** 2011-31781
- **Category:** park-regulation
- **Sub-agency:** National Park Service
- **Federal Register citation:** 76 FR 77131
- **CFR reference:** 36 CFR 7
- **Publication date:** 2011-12-12
- **Effective date:** 2011-12-15
## Abstract

This rule implements the Record of Decision for the 2011 Winter Use Plan/Environmental Impact Statement and governs winter visitation and certain recreational activities in Yellowstone National Park for the 2011-2012 winter season. The rule retains, for one additional year, the regulations and management framework that have been in place for the past two winter seasons (2009-2010 and 2010- 2011). Specifically, the rule retains provisions that: require most recreational snowmobiles operating in the park to meet certain National Park Service air and sound emissions requirements; require snowmobiles and snowcoaches in Yellowstone to be accompanied by a commercial guide; set daily entry limits on the numbers of snowmobiles (up to 318) and snowcoaches (up to 78) that may enter the park; and prohibit traveling off designated oversnow routes.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2011/12/12/2011-31781/special-regulations-areas-of-the-national-park-system-yellowstone-national-park)
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