| 1ST PLACE LAND CLEARING | 4949 BROADWAY #136 BOULDER CO 80304 | (303)565-6541 | NA | | |
| 3 GENERATIONS TREE SERVICE | 2595 WEST EVANS AVENUE DENVER CO 80219 | (303)550-5786 | Www.3generationtree.com | | |
| A TIP TOP TREE COMPANY | 10140 W 44 AVE WHEAT RIDGE CO 80033 | (303)431-7910 | | Large Tree | |
| ABENAKI TREE SERVICE LLC | 1170 VERBENA ST DENVER CO 80220 | (720).63-3.40 | | Large Tree | |
| ACADEMY ARBORIST | 3734 ALCOTT ST DENVER CO 80211 | (303)936-4935 | Academy Arborist on Facebook | Large Tree | |
| ADAMS TREE CARE LLC | 2577 S OSWEGO ST AURORA CO 80014 | (303)305-230 | na | Large Tree | |
| ALL PHASE LANDSCAPE CONSTRUCTION | 16080 SMITH RD AURORA CO 80011 | (303)360-0606 | | Arboriculture | |
| ALPINE TREE AND SHRUB CARE | 3427 HARRIOSN ST DENVER CO 80205 | (303)690-7135 | | Large Tree | |
| ARBOR FORCE | 12263 N 2nd St PARKER CO 80134 | (303)472-0192 | | Ornamental ; Spray | |
| ARBOR MOUNTAIN TREE EXPERTS | PO BOX 11108 ENGLEWOOD CO 80151 | (303)781-6205 | | Large Tree | |
| ARBOR SERVICES | 8847 NORWICH ST WESTMINSTER CO 80031 | (303)319-8714 | | Large Tree | |
| ARBORSCAPE | 5044 S YOUNGFIELD CT MORRISON CO 80465 | (303)795-2381 | | Arboriculture | |
| BARTLETT TREE EXPERTS | 2401 W HOWARD LANE AUSITN TX 78728 | (512)900-3528 | www.bartlett.com | | |
| BEAVER STUMP GRINDING | 45600 COTTONWOOD HILLS DR PARKER CO 80138 | (303)829-8414 | | Large Tree | |
| BLUE RIVER FORESTRY & TREE CARE | PO BOX 18744 BOULDER CO 80308 | (720)256-9056 | www.bluerivertreecare.com | Arboriculture | |
| BOSNIAN PINE TREE CARE AND LANDSCAPING | 1921 S MAGNOLIA ST DENVER CO 80224 | (720)231-2932 | | | |
| CANALES TREE SERVICE, LLC | 4575 FAIRPLAY WAY DENVER CO 80239 | (303).64-2.64 | | | |
| COLORADO TREES | 2582 INGALLS STREET EDGEWATER CO 80214 | (303)353-2828 | www.coloradotreetrimming.com | Large Tree | |
| COMPLETE TREE CARE | 2536 S DELAWARE ST DENVER CO 80223 | (303)922-3337 | | Arboriculture | |
| DAVEY TREE EXPERT | 2000 S QUEBEC DENVER CO 80231 | (303)750-9273 | | Arboriculture | |
| DOWN TO EARTH TREE SPECIALIST | 6050 W 39TH AVE WHEAT RIDGE CO 80033 | (303)547-4709 | | | |
| EAGLE TREE SERVICE | 820 MERCURY CIR LITTLETON CO 80124 | (303)799-8899 | | Large Tree | |
| ENVIRONMENTAL TREE CARE | 1199 S PIERCE ST. LAKEWOOD CO 80232 | (303)368-8454 | | Arboriculture | |
| GREAT WESTERN TREE CARE | 3730 ASPEN HOLLOW CT CASTLE ROCK CO 80104 | (720)535-8769 | www.greatwesterntreecare.com | Large Tree | |
| HOME TREE CARE SERVICE | 1310 IRONTON ST AURORA CO 80010 | (303)366-3813 | | Large Tree | |
| IDEAL TREE LLC | 3135 ENDICOTT DR BOULDER CO 80305 | (720) 37-8 10 | idealtreecolorado.com | Large Tree | |
| IMB TREE SERVICE | 4212 E 91ST DR. THORNTON CO 80229 | (303)289-1683 | | Large Tree | |
| IRONWOOD EARTHCARE | 312 NORFOLK ST UNIT A AURORA CO 80011 | (303)366-3020 | | Arboriculture | |
| J AND J TREE CARE | 1311 S GLENCOE ST DENVER CO 80222 | (303)753-0029 | | Arboriculture ; Large Tree ; Spray | |
| JONES TREE & LAWN CARE INC | 5497 HARLAN ST ARVADA CO 80002-4032 | (303)431-8132 | | Arboriculture | |
| JORDAN'S TREE MOVING & MAINTENANCE | 1025 SMITHFIELD DR FORT COLLINS CO 80524 | (970)482-6331 | | Large Tree | |
| KEESEN ENTERPRISES | 3355 S UMATILLA ST ENGLEWOOD CO 80110 | (303)761-0444 | | Arboriculture | |
| KING TREE & PROPERTY SERVICES | PO BOX 24743 DENVER CO 80224 | (303)399-7700 | | Large Tree | |
| LIMB WALKERS TREE SERVICE | 5378 NEWTON ST DENVER CO 80221 | (720)298-5477 | | Large Tree | |
| LUMBER BEE | PO BOX 22444 DENVER CO 80222 | (720)383-5005 | | Large Tree | |
| LYNN'S TREE & LANDSCAPE SERVICE | 10835 WILLOW REED CIR W PARKER CO 80134 | (720)366-3226 | | Large Tree | |
| M&H TREE SERVICE | 1166 S NOME ST AURORA CO 80012 | (303)639-9909 | | Large Tree | |
| MADLEE TREE SETRVICE | 15151 E ALAMEDA PARKWAY AUORA CO 80012 AURORA CO 80012 | (303)739-7127 | | | |
| MORTENSEN'S TREE SERVICE | 990 E COTTONWOOD AVE CENTENNIAL CO 80121 | (303)734-9320 | | Large Tree | |
| NUCKLES TREE CARE | 10900 E 151ST PL BRIGHTON CO 80602 | (303)775-7479 | www.nucklestreecare.com | | |
| PEREZ TREE SERVICE | 5544 N TUCSON ST DENVER CO 80239 | (303)906-4116 | | Large Tree | |
| PURPLE MOUNTAIN TREE CARE | 5306 E PRESCOTT AVE CASTLE ROCK CO 80104 | (303)995-5246 | | Large Tree | |
| QUALITRE, LLC | 6555 ZANG ST ARVADA CO 80004 | (303)974-0991 | none | Large Tree | |
| RED EARTH TREE SERVICE | 16199 GREEN VALLEY RANCE BLVD #3214 DENVE CO 80239 | (303)304-7924 | | Large Tree | |
| ROBERTS TREESCAPING | 2520 GALENA ST #2 AURORA CO 80010 | (303)366-1463 | | Ornamental | |
| ROCKY MOUNTAIN TREE CARE | 10575 W 64TH AVE ARVADA CO 80004 | (303)431-5885 | | Arboriculture | |
| ROOT DOWN TREE SPECIALISTS | 6361 S SPOTSWOOD CIR LITTLETON CO 80120 | (303)596-3107 | | | |
| ROOT TREE SERVICE LLC | 7740 S DEXTER CT CENTENNIAL CO 80122 | (720)369-2963 | roottreeservice.com | Arboriculture | |
| ROPE N SADDLE TREE SERVICE | 1330 REVERE ST AURORA CO 80011 | (720)385-9673 | | Large Tree | |
| ROSS TREE COMPANY | PO BOX 102622 DENVER CO 80250-2622 | (303)871-9121 | WWW.ROSSTREE.NET | Arboriculture | |
| ROYAL TREE | 1328 S DOWNING ST DENVER CO 80210 | (720)626-2412 | | Large Tree | |
| RUSHTON TREE SERVICE | 260 YOSEMITE WAY DENVER CO 80230 | (303)234-0902 | | Arboriculture | |
| SABELLS SNOW AND LAWN SERVICE INC | 13921 W BELLVIEW AVE MORRISON CO 80465 | (303)985-3272 | sabellsinc.com | Arboriculture | |
| SANDOVAL'S TREE CARE INC. | 982 S IRONTON ST AURORA CO 80012 | (720)767-6366 | | Large Tree | |
| SavATree, LLC | 8585 WARREN AVE DENVER CO 80231 | (303)337-6200 | | Arboriculture | |
| TAKEM OUT TREE SERVICE | 4254, MARSHALL ST WHEATRIDGE CO 80033 | (720)772-8253 | Takeem-Out-tree-service.business.site/ | Large Tree | |
| THE NATURAL WAY | 1952 W DARTMOUTH AVE ENGLEWOOD CO 80110 | (303)347-0988 | | | |
| TOP NOTCH TREE SERVICE | 2318 SHADOW CT LOVELAND CO 80538 | (970)556-5000 | | Large Tree | |
| TORRES TREE SERVICE | 1607 GENOA STREET AURORA CO 80011 | (720)231-6500 | | Large Tree | |
| WRIGHT TREE SERVICE | 149 WELD COUNTY ROAD 27 BRIGHTON CO 80603 | (303)654-1597 | | Arboriculture ; Utility Line Clearance | |