From late October to February, thousands of black and gold Monarch butterflies cluster in the limbs of a Eucalyptus grove at Pismo State Beach, providing us with a breathtaking glimpse of nature in all her vibrant glory. This colony, easily accessible from Highway 1, is one of the largest in the nation, hosting an average of 50,000 butterflies every year. Many of these fragile butterflies fly more than 1,000 miles, braving harsh weather conditions before coming to roost in the protected grove for the winter. During the season, the docent trailer opens every day at 10 a.m. and closes at 4 p.m. Walks through the grove happen at 11 a.m. and 2 p.m., weather permitting.