The seasons at Coe Park are typical of central California. Springtime, with its moderate temperatures and abundant water, is undoubtedly the best time to visit the park; it's also the most popular time, so you're likely to meet more people during the months of March, April, and May. Fall is also a good time to visit. Fall temperatures alternate between balmy and brisk, and colorful autumn leaves, dangling from trees, floating on breezes, and crinkling under foot, bring a sense of rest and replenishment. If you visit in the hot, dry months of summer, you'll probably want to keep your trips short and plan to ride in the morning or early evening.
Winter is also a great season to ride in Henry Coe. The trails and roads hold up well in wet weather, the weather is cool, and trail traffic is low. Be prepared for changeable weather.
Water is an important consideration year-round. In the spring, the creeks have plenty of water and are usually easy for horses and hikers to cross. In the winter, docile streams can turn into raging, impassable torrents after heavy rains. In the summer and fall, the creeks and some of the springs are usually dry. Keep in mind that you shouldn't depend entirely on springs you see marked on park maps; some of them are undeveloped, unmaintained, or unreliable. When you register at the Visitor Center for a day trip or for overnight camping, be sure to ask about the current condition of creeks and springs in the area you plan to visit.