Marie Sierra is a former elementary school teacher turned entrepreneur. She describes herself as a “lover of the outdoors, self-renowned chef, half-marathon runner, avid reader, wellness enthusiast, and ‘fit-ish’ 50-year old.” As a passionate advocate for her community, she believes in the power of collective action to create a healthier and more vibrant, sustainable environment for everyone. Her mission is to uplift and support the community through volunteerism, focusing on initiatives like river clean-ups and programs that nourish our children. She also hopes to make an impact by promoting better nutrition and well-being through her business.
Why do you value the natural areas? Why do you think natural spaces in general are important?
I value natural areas like the ones here in San Marcos because they provide so much more than just a place for physical exercise. The beauty and tranquility of these spaces offer a unique opportunity to connect with nature, which is incredibly rejuvenating for the mind and spirit. Being surrounded by fresh air, trees, and wildlife helps clear my mind, reduce stress, and lift my mood. Nature has a powerful way of restoring mental energy and easing mental fatigue, making it an essential part of my overall well-being. These natural spaces serve as a peaceful escape from the busyness of daily life, promoting mental clarity and emotional balance while also encouraging healthy movement. Overall, they are vital for both physical health and mental health, offering a holistic environment that nurtures body, mind, and soul.
Who or what most influenced your view of the natural world?
My grandmother was the foundation of all the wonderful things in my life. I fondly remember taking walks with her down the dead-end road where she lived off Bishop Street, a place that no longer feels as natural, given the new houses that have been built there since. Yet, there was once a wild, brushy area down that road that drew us in. We would venture out to gather cactus and chili pequins so she could make her beloved nopales and salsa. Armed with a basket and a foldable stool, she would skillfully cut and dethorn the cactus while I explored the surroundings, feeling as though I had stepped into a deep forest. I reveled in the thrill of adventure and the simple joy of being outside.
The moments we spent together—whether walking in comfortable silence or chatting away during those “hikes”—are forever etched in my heart. It was during those times, right there on Clyde Street off Bishop, that my love for the outdoors blossomed. The beauty of nature and the bond I shared with her have left a lasting impression on my view of the natural world.
What attracted you to the Greenbelt Alliance?
We were drawn to the San Marcos Greenbelt Alliance because of its commitment to preserving and enhancing the natural beauty and ecological health of our community. The organization’s dedication to fostering outdoor recreational opportunities while promoting environmental stewardship resonates deeply with my values. I appreciate how the Alliance brings people together—encouraging community involvement and education about the importance of protecting our natural spaces.
Moreover, the opportunity to engage in conservation efforts and help maintain the trails and green spaces allows me to contribute to something meaningful. The Greenbelt Alliance embodies a vision of sustainability and community connection that we wholeheartedly support, making it a perfect fit for our passion for nature and desire to make a positive impact in our area.
What do you most enjoy doing in support of SMGA?
We love exploring the trails and immersing ourselves in nature, which strengthens our connection to the community and the environment. Overall, our greatest joy comes from contributing to the mission of SMGA and helping create lasting, positive change in our beloved greenbelt.
What is your favorite trail? What do you like about it?
While we don’t have a single favorite trail, we truly enjoy the Spring Lake Natural Area. My husband and I often gather a group of friends and acquaintances who have never hiked before to embark on a three-mile hike down the Blind Salamander Trail and out to Lime Kiln Road. This shorter yet moderate hike helps people of all fitness levels build confidence in their hiking abilities. It’s just the right length and not too strenuous, ensuring that everyone can fully enjoy the experience.
Along the way, we get to enjoy the dock, where we can take in the beautiful aquatic life, and there’s an overlook that offers a stunning view. Additionally, the restroom at the Lime Kiln Trailhead is a welcome pit stop before we head back. Overall, it’s a wonderful trail that allows us to share the joy of nature with others.
What do you most enjoy doing when you visit the Greenbelt?
We most enjoy the hike the trails & take in all it has to give.
What recommendations would you give new users of the trail?
For new users of the trail, here are some recommendations to enhance your experience:
- Stay on Designated Paths: To protect the natural environment and wildlife, always stick to the designated trails. This helps prevent erosion and preserves native plant life.
- Wear Appropriate Footwear: Invest in comfortable and sturdy footwear, such as hiking boots or trail shoes, to provide support and traction on uneven terrain.
- Bring Plenty of Water: Staying hydrated is essential, especially during warmer months. Always carry enough water for your hike and consider bringing snacks for energy.
- Check the Weather: Be aware of the weather forecast before heading out. Dress in layers and be prepared for changes in temperature or unexpected conditions.

- Observe Wildlife from a Distance: While it’s exciting to see wildlife, maintaining a respectful distance helps protect both you and the animals.
- Be mindful of Trail Etiquette: If you encounter other hikers or bikers, yield to those traveling uphill or on foot. A friendly greeting or smile goes a long way!
- Leave No Trace: Bring any trash you create back with you and avoid picking plants or disturbing wildlife, ensuring the trail remains beautiful for others to enjoy.
- Know Your Limits: Choose trails that match your fitness level and experience. It’s better to start with shorter, easier trails and build up to more challenging ones.
- Use a Trail Map or App: Familiarize yourself with the trail layout before setting out. Having a map or a hiking app can help you stay oriented and find your way.
- Enjoy the Journey: Take your time to absorb the beauty around you, whether it’s the sights, sounds, or scents of nature. Hiking is as much about the journey as it is about reaching your destination.
By following these tips, new users can have a safe, enjoyable, and rewarding experience on the trails!