San Marcos Greenbelt Alliance Board Members

Born and raised in Austin, Eric Weeks developed a passion for nature while spending time outdoors as a Boy Scout. He earned a Bachelor’s in Resource & Environmental Studies from Texas State University in 2014. During his last semester, he obtained a position leading the City of San Marcos’ Conservation Crew, mitigating impacts of river recreation. In 2015, Eric was promoted to Habitat Conservation Plan Specialist and later the Discovery Center Coordinator. Eric is passionate about environmental stewardship, particularly invasive plant management and native restoration. He leads monthly natural area volunteer workdays. In his free time, Eric enjoys hiking, gardening, and spending time with his wife and two dogs.

Alan Holzgrafe moved to San Marcos in 1984 from Wichita Falls to attend Southwest Texas State University. It was the start of a wonderful relationship with a very special city. It was also the beginning of lifelong friendships oriented around caving, paddling, and enjoying many of the area parks and green spaces. He spent free time caving with the campus caving club, paddling the San Marcos River, participating in river cleanups, and going on many campus Outdoor Center sponsored trips. He worked at the campus Aquatic Biology Department, at the U. S. Fish Hatchery on McCarty Lane, and at the Edwards Aquifer Research and Data Center. He graduated with an accounting degree in 1988. He sees himself more a biologist at heart than an accountant. Since the start of his career took him to Guam, his relationship with San Marcos became a distant one, but he visited every chance he got to pick up where he had left off. In 1995, he returned to Texas to continue and complete his career in San Antonio. Since last summer, he has been working with the SMGA trail crew. He remains eager to spend time and energy on continuing that wonderful relationship with San Marcos and the area that became so special to him in 1984.

Born and raised in Central Texas, Aspen Navarro was pulled to the outdoors through sports at a young age and never looked back. Starting in 2012, San Marcos became her home away from home when she began her college career at Texas State University. Aspen has earned a B.S. in Geography Resource and Environmental Studies, an M.S. in Sustainability Studies, and certifications in Geographic Information Science, Water Resources Policy, and Environmental Interpretation, all from Texas State University. In her current position at The Meadows Center for Water and the Environment, she serves as the Watershed Services Community Science Manager, where she manages the Texas Stream Team and other community Science initiatives. In her spare time, Aspen enjoys spoiling her pup, hiking, food, and traveling.

Ben Peck has been instrumental in SMGA’s fundraising efforts over the past year, helping the Board coordinate events and partnerships that raise funds to further our mission. He used to build custom bikes, is an expert welder, and is an enthusiastic member of the trail crew. He works with the SMGA trail crew as much as he can and loves the opportunity to share his excitement and respect for the outdoors.

Matt Lewis moved to San Marcos from Houston at the age of 15. In 2003, he earned a degree in geography with an emphasis in urban and regional planning from Texas State University, and in 2011, he received his urban design certification and Congress of New Urbanism Accreditation (CNUa) at the University of Miami School of Architecture. Before launching Simplicity Design, Matt spent his public sector career, between 2004-2016, as the Director/ Assistant Director in three of the fastest-growing communities in the nation—Hutto, San Marcos, and Austin. Relevant experience includes leading Vision San Marcos: A River Runs Through Us, winner of the Central Texas APA Current Plan of the Year in 2013, which included extensive public outreach and written to be a concise strategic planning document created for everyday users; and directing the Heart of Hutto Old Town Master Plan & Smart Code, winner of the 2009 Envision Central Texas Community Stewardship Award honoring innovative projects helping to preserve and enhance our region’s quality of life, natural resources, and economic vitality. Through Simplicity Design, Matt is committed to preserving the natural environment by enhancing the design and quality of our built environment. Nationally recognized for his award-winning designs, he is considered an industry leader for his ability to establish a community vision through fun and innovative engagement and turn it into a fiscally sustainable reality. Matt spends his free time at the river, on the trails, and at the skatepark.

Greg grew up in Houston and developed a love of the outdoors when sailing with his dad and camping as a teen in the great parks of Texas. Greg got his bachelor’s degree in chemistry at Baylor University, then spent 7 years in Houston at Baylor College of Medicine, where he also completed his residency in Internal Medicine. He semi-retired in March 2021 and began working with the SMGA trail crew on Thursday mornings. He continues to work with Christus Hospice-San Marcos. Greg has lived in San Marcos since 1988. He enjoys the Hill Country and sees the need to preserve greenspace as this area’s population expands. He spends time working on his property with an eye toward improving it for local wildlife. He has served as a member of the City Airport Commission and the San Marcos Education Foundation, as an assistant scoutmaster for Troop 112, and as a member of the board of the Upper San Marcos Watershed District and various church committees. He enjoys hiking, sailing, and backpacking. Now that they have time, he and his wife are exploring and hiking parks throughout Texas and the country.