Haley Mast

Haley Mast

Haley Mast is a small organic farm owner, an intern for a non-profit organization, and has a background in writing and editing. She is a recent graduate student from Harvard Extension University, where she studied sustainability with a focus in agriculture. Her prior writing and editing roles included topics in lifestyle and environmental matters. 


  • 5+ years writing about environmental and agricultural topics
  • Organic farm owner
  • Lead writer for the environmental column at Columbia Community Connection
  • Communications and Social Media Intern for a climate movement organization; Our Climate


Haley has a professional background in writing, editing, fact-checking, social media managing, graphic design, and marketing for local and global non-profits, news and media outlets, and large corporations. She is also the owner of a small organic produce farm. As a fact-checker for The Spruce, Haley ensures the contents of published pieces are accurate and up-to-date.

Read more about The Spruce's Editorial Policies and Standards.


Haley has her graduates in Sustainability focused on Agriculture from Harvard Extension University.

Expertise: Sustainability, Husbandry, Ecology, Conservation, Lifestyle
Education: Harvard Extension University
Location: White Salmon, Washington
Title: Fact Checker

About The Spruce Pets

The Spruce Pets, a Dotdash Meredith brand, is a new kind of pets website offering practical, real-life tips and training advice to help you care for your pet. The Spruce Pets reaches 10 million people each month. Learn more about us, our editorial process, and our commitment to ensuring we are providing you with the most trustworthy veterinarian advice.

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