- 10 Star Tree Care, 720-626-8745
- Altitude Arborist, 303-252-0818
- AP Excavation & Landscaping, 970-689-7512
- Arborforce, 303-472-0192
- Arborstar Tree Care
- Bailey Tree LLC, 720-940-6519
- Bartlett Tree Experts, 303-353-0520
- Berkelhammer Tree Experts INC, 303-443-1233
- Blade & Bough Tree Care
- Blue River Forestry & Tree Care, 720-256-9056
- Bodhi Tree Care
- Bullard Tree and Garden, 720-951-2995
- Cutting Edge Tree Care, 303-362-1002
- Davey Tree Expert
- Donovan Arborists LLC, 303-623-8733
- Environmental Tree Care, LLC, 303-368-8454
- Good People Tree Service, 303-847-5221
- Geesaman Tree Company
- Heartwood Tree Care
- Herm Enterprises LLC dba Herm Tree Service, 720-456-9234
- Hollar Tree Co LLC, 720-446-9832
- Lynn's Tree Service, 720-366-3226
- Mile High Tree Care, INC, 303-292-9393
- Mountain Tree Care, 303-443-9430
- O'Brien Tree Care, LLC, 720-322-3084
- Organo Lawn of Boulder, 303-499-2000
- Patriot Tree Company INC, 720-295-8733
- Reinholt Tree Care INC, 303-931-9282
- Rocky Mountain Arboricultural Consulting LLC
- Rocky Mountain Tree Care INC, 303-431-5885
- Roots & Shoots Tree Care, 303-947-4390
- Roots Arise
- Roots Up Tree Company, 720-637-3407
- Savatree LLC, 303-337-6200
- Scott Parry Certified Arborist LLC, 720-778-7191
- Shady Grove Tree Care, INC.
- Shiloh Woods Enterprises LLC dba Monster Tree Service of Greater Boulder
- Splintered Forest, LLC, 303-819-9840
- St Vrain Arbor Care LLC, 303-772-3136
- Super Tress Colorado LLC, 303-515-1655
- Summit Tree Care LLC
- Tannenbaum Tree Care, 720-704-1341
- Top Notch Tree Service LLC, 970-556-5000
- Urban Woods LLC, 720-365-4666
- Velte Forestry & Arboriculture
- Walker Tree Care
- We Love Trees INC, 720-385-7075
- Western Cut Tree Care, 720-421-0313
Extreme Weather Shelter
An "Extreme Weather Shelter" will be open from Saturday, Jan. 18 through at least Tuesday, Jan. 21 to provide safe shelter for unhoused community members during the dangerous cold spell.