San Elijo Lagoon is a coastal saltwater lagoon and ecological reserve located in Encinitas, California, near the community of Cardiff-by-the-Sea. It is one of the largest remaining coastal wetlands in the San Diego area, characterized by brackish water where freshwater from creeks mixes with incoming ocean tides. The primary paddling access is via the ocean at San Elijo State Beach, where a canal or entrance channel connects the Pacific Ocean to the lagoon. Launching is typically done from the south end of the campground at beach level or via wooden stairs along the cliffs. The lagoon itself is a protected area where motorized watercraft are prohibited, creating a calm environment suitable for kayaks and paddleboards. Paddlers navigate through a series of marshes with twists and turns, offering a relaxed and scenic route. However, boating, kayaking, swimming, and wading are not allowed within the San Elijo Lagoon Ecological Reserve. Paddlers must verify current regulations with managing authorities before attempting to enter the lagoon from the ocean. The ocean entry at San Elijo State Beach features a surf zone and potential shallow water hazards near the river's mouth, requiring caution during launch and landing. The area is known for its rich biodiversity, including numerous bird species like great blue herons and egrets, making it a destination for wildlife viewing. The surrounding area offers amenities such as the San Elijo State Beach campground and nearby restaurants in Cardiff-by-the-Sea. The overall paddling experience in the adjacent ocean area is gorgeous, with long stretches of cliff faces and offshore kelp beds, though the status of accessing the lagoon itself for paddling is legally unclear and potentially prohibited.