The Crossroads Campsite 21 is a developed and reservable campsite situated in the Imperial Reservoir watershed of Arizona. This fee area offers a breathtaking view of the surrounding area and is perfect for hiking, fishing, and boating. The campsite is equipped with amenities like picnic tables, fire rings, and vault toilets.

The nearby points of interest include the Imperial Reservoir, Gila Bend, and the Painted Rocks Petroglyph Site. The Imperial Reservoir is a popular spot for boating and fishing, while Gila Bend is known for its natural hot springs. The Painted Rocks Petroglyph Site is a historical site that features ancient rock carvings.

Interesting facts about the area include the fact that the Imperial Reservoir is one of the largest freshwater reservoirs in Arizona. Additionally, the Painted Rocks Petroglyph Site has more than 800 petroglyphs that are estimated to be more than 2,000 years old.

The best time of year to visit the Crossroads Campsite 21 is during the fall and winter months when the temperatures are mild. The average temperature during this time is around 70 degrees Fahrenheit. It is important to note that the summer months can be extremely hot, with temperatures reaching over 100 degrees Fahrenheit.

Sources:
- https://www.recreation.gov/camping/campgrounds/232220
- https://www.outdoorproject.com/united-states/arizona/crossroads-campsite-21
- https://www.visitarizona.com/places-to-visit/phoenix-central-arizona/gila-bend/painted-rocks-petroglyph-site/