Mountains to Sea Trail

This route, known as the Mountains to Sea Trail, is rated as difficult for jogging. It covers a distance of approximately 27.8 kilometers (17.3 miles) with moderate elevation changes, making it a challenging but rewarding experience.

The provided information does not specify dog-friendliness for this particular route. Generally, rules vary by park and trail section in the Irvine area. It's advisable to check local regulations for specific segments, especially around areas like the San Joaquin Marsh Wildlife Sanctuary or Colonel Bill Barber Marine Corps Memorial Park, before bringing your dog.

Given its location in Irvine, California, the trail is generally accessible year-round. However, for jogging, spring and fall offer the most pleasant temperatures, avoiding the hotter summer months and potential winter rains. Early mornings or late afternoons are ideal to avoid peak heat.

Based on the available information, there are no specific permits or entrance fees mentioned for jogging this particular Mountains to Sea Trail route from San Juan Creek to Newport Bay. However, always be aware of local park regulations, especially if accessing specific facilities or protected areas along the way.

The starting point for this route is near San Juan Creek. While specific parking details are not provided, you would typically look for public parking areas or designated trail access points in the vicinity of San Juan Creek or near the Colonel Bill Barber Marine Corps Memorial Park, which is a highlight along the route.

This route is primarily designated for jogging, suggesting a mix of paved paths and possibly well-maintained unpaved sections. Highlights like the San Diego Bike Trail (western section) and Back Bay Drive indicate smooth surfaces suitable for running. Expect some gentle inclines and declines, with a total elevation gain of about 161 meters (529 feet).

The route offers several interesting points. You'll pass through the Colonel Bill Barber Marine Corps Memorial Park, follow sections of the San Diego Bike Trail, and skirt the San Joaquin Marsh Wildlife Sanctuary. There's also an Estuary wildlife observation area and the scenic Back Bay Drive, culminating near Newport Dunes.

Yes, this route incorporates sections of several other official trails. You'll find yourself on parts of the California Mission Trail - stage 03 San Juan Capistrano to Mission San Gabriel Arcangel, the San Diego Creek Bike Trail, and the Back Bay Loop Trail, among others. It also intersects with various segments of the San Diego Creek Trail and Harvard sidepath.

Given its 'difficult' rating and nearly 28-kilometer (17.3-mile) length, this specific route is generally not recommended for beginner joggers. It's better suited for those with a good level of fitness and experience in longer distance running. Beginners might consider exploring shorter segments of the trail or other local paths first.

As the trail passes through areas like the San Joaquin Marsh Wildlife Sanctuary and an Estuary wildlife observation area, you have a good chance of spotting various bird species, especially waterfowl and migratory birds. Small mammals and local flora typical of Southern California wetlands and coastal areas can also be observed.

While specific facilities are not detailed, passing through parks like Colonel Bill Barber Marine Corps Memorial Park and along developed areas like Newport Dunes suggests that restrooms and water fountains may be available at these points. It's always wise to carry your own water, especially for a route of this length.