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Dr. Dalton Plum (Mackay) or “Dalton” as she likes to be called, is a board certified family medicine doctor with over 15 years experience in the medical field caring for patients of all ages and backgrounds.
She received her BA from Oral Roberts University, her Medical Degree at the University of the Caribbean, and completed her residency in Tulsa, OK.  Dalton has gained education and experience, and opportunities to participate in numerous healthcare programs. She understands what a blessing our United States healthcare is and loves to offer that quality of care to her patients. She prefers treating the whole family, which is why she chose this specialty.

Dalton is a native of Castle Rock with deep roots in the community, as a descendant of four generations of Coloradans!

Although this is her foundation, her training has spanned the globe – from the Caribbean to Africa and Ireland!

When not pursuing her passion of practicing medicine, she can usually be spotted around Castle Rock with her husband and three boys in the park or at a local restaurant.  


Don’t be shy to say HI to the doc!


Female Golfer

Awesome Family Doctor!!

“Dalton is a great physician in every sense of the word: she listens to the client’s concerns, educates the patient and then supports the client’s autonomous choices and provides exceptional care!! She spends appropriate time gathering data, performing assessments and discussing options. I have not felt rushed or railroaded into treatments. I love her dedication to her profession and clients!!!.

-Self-verified patient of Dr. Dalton J Mackay – Posted June 2023 -from


Best Family Medicine

“Dr Mackay is amazing! She is conscious of each patient's circumstances and situation and provides the most honest advice and options. She is amazing with my children and even though I have insurance through my job, I have no intention of leaving her. Her compassion and knowledge has never steered us wrong and she has an amazing way of bonding with and putting her patient's at ease..”

-Self-verified patient of Dr. Dalton J Mackay – Posted March 2022 - from

Man Fishing

Caring & Competent

“Dr Mackay is a very caring and competent doctor. She works with you to manage your well being. She listens to you and educates you so you can make the best decisions. Her office staff is friendly, caring, helpful too. Just a great experience.”

-Self-verified patient of Dr. Dalton J Mackay – Posted on August 2016 -from

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