Annie's Canyon and San Elijo Lagoon Loop

The route is approximately 6.8 km (4.2 miles) long and generally takes about 45 minutes to jog, depending on your pace and how much time you spend exploring the canyon.

The terrain varies significantly. Around the San Elijo Lagoon, you'll find mostly paved, flat, and wide paths, ideal for easy jogging. However, as you approach Annie's Canyon, the trail transitions to loose sand and uneven ground. Inside the canyon, expect very narrow, winding passages through sandstone walls, including ladder-style stairs, wooden-plank stairs, and sections where you might need to scramble using both hands and feet. There's also a steep climb after exiting the slot canyon.

You'll enjoy expansive views of the restored San Elijo Lagoon Ecological Reserve, a vital coastal wetland known for diverse plant and animal life. It's an excellent spot for birdwatching, with many species including waterfowl and osprey. You'll also see salt marsh habitats, coastal sage scrub, and even glimpses of the Pacific Ocean. The unique, carved sandstone walls of Annie's Canyon offer a striking visual contrast.

The trail is enjoyable year-round, but spring and fall offer the most pleasant temperatures for jogging. Early mornings are often best to avoid crowds, especially in the narrow sections of Annie's Canyon, and to experience cooler weather.

Parking is available at various points around the San Elijo Lagoon. A common access point for Annie's Canyon is near the Rios Avenue trailhead. Due to the trail's popularity, arriving early, especially on weekends, is recommended to secure a spot.

Dogs are generally allowed on leash on the main lagoon trails. However, the slot canyon section of Annie's Canyon is very narrow and involves ladders and tight squeezes, making it potentially unsuitable for large dogs or those uncomfortable with confined spaces. There is an alternative, moderate switchback trail that bypasses the most challenging parts of the slot canyon, which might be a better option if you're jogging with a dog.

No, there are no permits or entrance fees required to access the trails within the San Elijo Lagoon Ecological Reserve, including Annie's Canyon. It is free and open to the public.

While much of the loop is easy to moderate, the Annie's Canyon slot canyon section is considered more challenging. It's very narrow, requiring some scrambling and navigating ladders and tight spaces. It might not be suitable for those with claustrophobia or very young children. An alternative, less strenuous switchback trail is available to bypass the most difficult parts of the slot canyon.

Yes, the route incorporates sections of several other trails, including the Rios Avenue Trail, Gemma Parks Loop, Pole Road, and the Nature Center Outer Loop, offering a diverse jogging experience.

Restrooms and water fountains are typically available at the San Elijo Lagoon Nature Center, which is located along the loop. It's always a good idea to carry your own water, especially on warmer days.

The primary highlights are the unique Annie's Canyon slot canyon with its carved sandstone walls, and the expansive views of the San Elijo Lagoon Ecological Reserve, a significant coastal wetland. The combination of these two distinct natural features makes this loop particularly special.