The ridge has two main peaks, the western one being 1,939 feet (591 m) above sea level and eastern one being 2,265 feet (690 m). The East peak contains an extensive microwave antenna. This site was featured in several articles of the Napa Valley Sentinel.
Sugarloaf ridge has been one of the first parks to close under the California State Parks plan to close up to 70 of its 278 parks due to budget cuts. The closures were deemed necessary to achieve an $11 million reduction in the next fiscal year 2011/12, that amount increasing to $22 million in the following fiscal year 2012/13.  The park was reopened by Team Sugarloaf in June 2012  to restore access to camping and hiking trails.