Could one of San Marcos' last large undeveloped properties become the city's next major community park? That's the question city leaders are beginning to explore after taking the first step toward finding a partner to help develop the 40-acre Rancho Tesoro park site.

Located near Discovery Lake and the Rancho Tesoro neighborhood, the property is currently a mix of open space, hiking and biking trails, a soccer field, and protected conservation areas. While residents can already enjoy parts of the site, the land has the potential to become a much larger recreation destination for the San Marcos community.

Why Isn't the Park Being Developed Now?

The biggest challenge is cost.

According to the City of San Marcos, fully developing the site could cost approximately $40 million. That estimate includes site preparation, utility infrastructure, construction, and environmental mitigation.

Rather than funding the project entirely with city dollars, San Marcos is beginning the process of exploring a public-private partnership. The goal would be to find an organization willing to invest in building recreational amenities while keeping the property dedicated for public park and recreation use.

It's important to note that no development plans have been approved and no private partner has been selected. The City Council recently approved the first procedural step that allows the city to begin evaluating whether this type of partnership is feasible.

One of the Last Large Park Opportunities in San Marcos

The 40-acre Rancho Tesoro property is one of the last sizeable undeveloped parcels in San Marcos that could accommodate a major community recreation facility.

For perspective, the site is comparable in size to the developed park area planned at Carlsbad's Veterans Memorial Park, giving residents an idea of what a future recreation destination could potentially look like.

While no specific amenities have been proposed, city officials have indicated they would prioritize uses consistent with the park's designation, including:

• Athletic fields
• Public recreation facilities
• Outdoor leisure spaces
• Community-oriented amenities

Any future proposal would still require City Council review before moving forward.

What This Could Mean for San Marcos

As North County continues to grow, recreational space becomes increasingly valuable. Parks aren't just places to play—they're gathering places for families, youth sports, community events, and everyday outdoor activities.

If a public-private partnership proves successful, the Rancho Tesoro property could become one of the most significant park projects San Marcos has seen in years. At the same time, the city is making it clear that this is still the beginning of the process, and there are many steps before any construction begins.

Final Thoughts

This story is worth watching because it represents more than just another development project. It's about how San Marcos plans to invest in community recreation as the city continues to grow.

For now, there are no finalized plans—just the opportunity to start exploring what this space could become.

If you could design this park, what's the one feature it absolutely has to include? Whether it's pickleball courts, mountain bike trails, splash pads, sports fields, or something completely different, the conversation is just getting started.