Boulder
4WD Roads within 20 miles of Boulder

|
| Group |
4WD Road |
Road # |
Difficulty |
| A |
Lefthand Main |
FR286 |
Moderate - 6 |
| A |
Carnage Canyon |
FR286A |
Extreme - 10 |
| A |
Mother Hill |
FR286C |
Moderate - 7 |
| A |
Upper Creek |
FR286E |
Moderate - 5 |
| A |
Fireman Hill |
FR286D |
Difficult - 8 |
| A |
Castle Gulch |
FR287 |
Moderate - 7 |
| A |
Castle Gulch Ridge |
FR287A |
Moderate - 6 |
| A |
Miller Rock |
FR252/254 |
Difficult - 8 |
| B |
Beaver Bog |
FR113 |
Easy - 2 |
| B |
Dry St. Vrain |
FR185/186 |
Easy - 2 |
| B |
Middle St. Vrain |
FR114 |
Moderate - 7 |
| B |
Coney Creek |
FR507 |
Moderate - 5 |
| B |
Bunce School Road |
FR115 |
Easy - 3 |
| B |
Bunce School Road Cutoff |
FR217 |
Easy - 4 |
| B |
Iron Clads |
FR216 |
Moderate - 5 |
| C |
Nugget Hill / Walker Mtn |
FR509 |
Moderate - 7 |
| C |
Spring Gulch |
FR370,372 |
Moderate - 5 |
| C |
Bear Gulch |
FR235 |
Easy - 3 |
| C |
Switzerland Trail |
FR326,327,120 |
Easy - 2 |
| C |
Four Mile Gulch |
FR328 |
Easy - 1 |
| C |
Gordon Gulch |
FR226,228,233,314 |
Easy - 1 |
| C |
Peewink Road |
FR332 |
|
| D |
Caribou |
FR505 |
Moderate - 5 |
| D |
Rainbow Lakes |
FR298 |
Easy - 1 |
| E |
Baltimore Ridge |
FR416 |
Easy - 2 |
| E |
Jenny Creek |
FR502 |
Moderate - 7 |
| E |
Kingston Peak |
FR353 |
Moderate - 5 |
| E |
Mammoth Gulch |
FR176 |
Easy - 3 |
| E |
Moon Gulch |
FR290 |
Moderate - 5 |
| E |
Phoenix Ghost Town |
FR105, 109 |
Easy - 4 |
| E |
Rollins Pass |
FR149 |
Easy - 1 |
| F |
Winiger Gulch |
FR97 |
Easy - 1 |
| F |
Winiger Ridge |
FR359 |
Easy - 2 |
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