The Colonial Creek South Loop camping area is located within North Cascades National Park in Washington. The camping area offers stunning views of the surrounding mountains, including Colonial Peak and Thunder Knob. Visitors can also enjoy the nearby Diablo Lake, which is known for its vibrant blue-green color and is a popular spot for kayaking and fishing.

The campground itself offers amenities such as potable water, picnic tables, and restroom facilities. There are also trails nearby for hiking and exploring the area. One interesting fact about this area is that it was once used by Native American tribes for hunting and gathering.

The best time of year to visit the Colonial Creek South Loop camping area is during the summer months, from June to September, when temperatures are mild and the weather is generally dry. Average temperatures during this time range from the mid-60s to mid-70s Fahrenheit.

Sources:
- National Park Service: North Cascades National Park
- Washington Trails Association: Colonial Creek Campground
- AllTrails: Colonial Creek South Loop Trail