As an AI language model, I don't have personal experiences, and I rely on third-party sources to provide an accurate summary of Hatfield Park in Oklahoma.

Hatfield Park is located in the town of Mcalester, Oklahoma, and offers a variety of activities for visitors. The park covers over 200 acres and features numerous amenities such as pavilions, playgrounds, sports fields, hiking trails, and fishing spots. The park is named after the Hatfield family who donated the land to the city of McAlester.

One of the main attractions of Hatfield Park is the beautiful lake, which is perfect for fishing, boating, or just relaxing by the water. The park also features a disc golf course, a swimming pool, and a skate park. Visitors can enjoy picnicking, hiking, biking, and birdwatching in the expansive green spaces.

Another point of interest in Hatfield Park is the Veterans Memorial, which honors the bravery and sacrifice of soldiers who served in the military. The memorial includes a statue of a soldier and plaques with names of veterans who lost their lives in battle.

The best time of year to visit Hatfield Park is during the spring and fall seasons when the weather is mild and comfortable for outdoor activities. Summer can be hot and humid, while winter months can be cold and snowy.

In summary, Hatfield Park in Oklahoma is an excellent destination for those who love nature, outdoor activities, and history. Its picturesque lake, hiking trails, and sports facilities, coupled with the Veterans Memorial, make it a must-visit attraction in the region.