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Mark Mortensen, ISA Certified Arborist RM-1002A

An arborist is a specialist in the care of individual trees. Arborists are knowledgeable about the needs of trees, and are trained and equipped to provide proper care. Mark Mortensen is among the best and has worked in the field since 1996.

Pruning or removing trees, especially large trees, can be dangerous work. Tree work should only be done by those trained and equipped to work safely in trees.

Well cared for trees are attractive and can add considerable value to your property. Poorly maintained trees can be a significant liability.

Contact us now or call Mark Mortensen directly at Mortensen Tree Service 303-734-9320 to schedule a free evaluation today.

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Tree Services Provided by Mortensen Tree Service:

  • Natural Form Pruning
  • Tree Removal
  • Tree Care
  • Tree Service
  • Horticultural Consultation
  • Tree Trimming
  • Emergency Tree Service
  • Stump Grinding
  • Stump Removal
  • EnviroTree™
  • Ultimate Turf™
  • BTN+ BioTech Nutrients
  • Solutions 4Earth

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Testimonials for Mortensen Tree Service:


"You Can Count on Mortensen Tree Service"

Mark Mortensen is passionate about trees, which is probably why he gets such good results. He saved our maple tree when we thought it wouldn't survive very bad damage after a blizzard eleven years ago. His expert trimming and EnviroTree treatments have kept our trees happy and healthy for years. We have recommended Mortensen Tree Service to many friends and family members who are now also long-time satisfied clients. Thanks, Mark!

Larry and Lola H.  Centennial, CO

"Excellent caring service"

Mark Mortensen of Mortensen Tree Service is absolutely excellent. I have had him do work for me twice now, and would hire him again without hesitation. About a year or two ago he had cut a tree down next to our driveway because it was interfering with the cars in the neighborhood, and more recently they trimmed our front tree and did an excellent job. They also made sure not to leave a mess, which was very much appreciated.

Because Mark is an arborist he knows exactly what he is doing, and is not just choosing random branches and cutting them off. What I loved most about him was how he showed me a catalog of work that he had already done, and also recommended products for us to use in order to maintain our trees. We bought two bottles of Envirotree from him in order to keep our trees, plants, and lawn green. At first I was hesitant to buy the product because it was a little pricey, but sooner than I thought I had seen very good results. I don't think my lawn has ever been so green!

Mark definitely knows what he is doing and is great at it, but Mortensen's Tree Service really lives up to its name by providing actually great service. He and his helpers are wonderful, kind, and caring. When we had put in another order for EnviroTree his wife actually came to our house and personally delivered the product.

Without a doubt, I would recommend Mark and everyone at Mortensen's Tree Service.

Phyllis J.  Highlands Ranch , CO

Mortensen is the BEST!

I chose Mark Mortensen when I was walking through my neighborhood and saw him and Andy working together on a neighbor's tree. I could tell by how they spoke to each other how knowledgable and professional they were. When Mark came to give us an estimate, we were impressed with his background and body of work. We hired him, and he and Andy came and did an outstanding job for us. They were fast, efficient, friendly and tidy. We can't say enough good things about them! We plan to hire them again this winter when we need more things done.

Heidi & Chris K.  Centennial, CO

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