| 4201 | RESERVE FEDERAL 3-65 35-34 | Adams County, CO | Oil & Gas Property | Nov 2025 |
| 4202 | RESLER | Washington County, CO | Oil & Gas Property | Feb 2015 |
| 4203 | RESOLUTE | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 4204 | RETHERFORD | Montezuma County, CO | Oil & Gas Property | Sep 2012 |
| 4205 | REVEILLE A3 | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 4206 | REYNOLDS | Weld County, CO | Oil & Gas Property | Oct 2019 |
| 4207 | REYNOLDS | Weld County, CO | Oil & Gas Property | Dec 2018 |
| 4208 | REYNOLDS CATTLE | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 4209 | RH FARMS | Weld County, CO | Oil & Gas Property | Sep 2024 |
| 4210 | RHINO D 27 | Weld County, CO | Oil & Gas Property | Apr 2020 |
| 4211 | RHOADARMER | Weld County, CO | Oil & Gas Property | May 2016 |
| 4212 | RHOADES | Cheyenne County, CO | Oil & Gas Property | Dec 2025 |
| 4213 | RHOADES 3-33 | La Plata County, CO | Gas Property | Dec 2025 |
| 4214 | RHODES 1 | La Plata County, CO | Gas Property | Dec 2025 |
| 4215 | RICE | Logan County, CO | Oil & Gas Property | Nov 2025 |
| 4216 | RICE | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 4217 | RICE 22 | Weld County, CO | Oil & Gas Property | Apr 2020 |
| 4218 | RICHARD R FINDLAY | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 4219 | RICHARDSON | Weld County, CO | Oil & Gas Property | Apr 2016 |
| 4220 | RICHARDSON | Weld County, CO | Oil & Gas Property | Jun 2020 |
| 4221 | RICHARDSON | Yuma County, CO | Gas Property | Nov 2025 |
| 4222 | RICHARDSON | La Plata County, CO | Gas Property | Nov 2025 |
| 4223 | RICHERS | Yuma County, CO | Oil & Gas Property | Nov 2025 |
| 4224 | RICHTER | Weld County, CO | Oil & Gas Property | May 2025 |
| 4225 | RICKS | Weld County, CO | Oil & Gas Property | Sep 2019 |
| 4226 | RICO LC29-7 | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 4227 | RIDGE STATE | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 4228 | RIDGWAY | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 4229 | RIEDER | Weld County, CO | Oil & Gas Property | Dec 2018 |
| 4230 | RIEDER 18 | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 4231 | RIEKE | Logan County, CO | Gas Property | Jan 2026 |
| 4232 | RIFLE FALLS | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 4233 | RIGBY | Rio Blanco County, CO | Oil & Gas Property | Dec 2025 |
| 4234 | RIGGS | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 4235 | RILEY LD19-7 | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 4236 | RINGO FEDERAL LC23-72 | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 4237 | RINN VALLEY | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 4238 | RIO 1 | Adams County, CO | Oil & Gas Property | Nov 2025 |
| 4239 | RIO 2 | Adams County, CO | Oil & Gas Property | Nov 2025 |
| 4240 | RIO LC 12 | Adams County, CO | Oil & Gas Property | Nov 2025 |
| 4241 | RISSLER STATE | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 4242 | RITCHEY | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 4243 | RITCHEY | Weld County, CO | Oil & Gas Property | Jun 2020 |
| 4244 | RITEAWAY | Weld County, CO | Oil & Gas Property | Apr 2024 |
| 4245 | RIVA | Weld County, CO | Oil & Gas Property | Dec 2019 |
| 4246 | RIVA BLUE | Weld County, CO | Oil & Gas Property | Feb 2020 |
| 4247 | RIVER RANCH | Garfield County, CO | Oil & Gas Property | Dec 2025 |
| 4248 | RIVERBEND | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 4249 | RMF 3 | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 4250 | RMF 4C-15HZ | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 4251 | RMF 5N-15HZ | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 4252 | RNPU 19 | Rio Blanco County, CO | Oil & Gas Property | Dec 2025 |
| 4253 | ROACH N1 | Weld County, CO | Oil & Gas Property | Sep 2024 |
| 4254 | ROAD RUNNER FED 0397-23-14 | Rio Blanco County, CO | Oil & Gas Property | Nov 2025 |
| 4255 | ROADRUNNER | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 4256 | ROADRUNNER | Montezuma County, CO | Oil & Gas Property | Jan 2011 |
| 4257 | ROADSTER | Las Animas County, CO | Gas Property | Dec 2025 |
| 4258 | ROBBINS | Washington County, CO | Oil Property | Nov 2025 |
| 4259 | ROBBINS RANCH | Baca County, CO | Gas Property | Nov 2023 |
| 4260 | ROBERT | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 4261 | ROBERT DULIN | La Plata County, CO | Gas Property | Nov 2025 |
| 4262 | ROBERT MCCOY | La Plata County, CO | Gas Property | Nov 2025 |
| 4263 | ROBERT POWERS | Weld County, CO | Oil & Gas Property | Jan 2021 |
| 4264 | ROBERT&JOANN KLIE | Yuma County, CO | Gas Property | Nov 2025 |
| 4265 | ROBERTS | Boulder County, CO | Oil & Gas Property | Jul 2025 |
| 4266 | ROBERTS | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 4267 | ROBERTS CANYON | Mesa County, CO | Oil & Gas Property | Dec 2025 |
| 4268 | ROBERTSON | Yuma County, CO | Gas Property | Nov 2025 |
| 4269 | ROBERTSON 1 | Weld County, CO | Oil & Gas Property | Mar 2025 |
| 4270 | ROBIDOUX | Moffat County, CO | Gas Property | Feb 2015 |
| 4271 | ROBIN 9 | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 4272 | ROBINSON | Garfield County, CO | Oil & Gas Property | Dec 2025 |
| 4273 | ROBINSON 1 | Las Animas County, CO | Gas Property | Dec 2025 |
| 4274 | ROCK CANYON | Garfield County, CO | Gas Property | Nov 2025 |
| 4275 | ROCKWELL | Yuma County, CO | Oil & Gas Property | Nov 2025 |
| 4276 | ROCKY | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 4277 | ROCKY MOUNTAIN FUEL | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 4278 | ROCKY MTN FUEL | Weld County, CO | Oil & Gas Property | Dec 2018 |
| 4279 | RODEWALD | Moffat County, CO | Oil & Gas Property | Dec 2025 |
| 4280 | RODMAN BRUN | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 4281 | ROE 13-1 | Garfield County, CO | Oil & Gas Property | Dec 2025 |
| 4282 | ROGER KELLY | La Plata County, CO | Gas Property | Nov 2025 |
| 4283 | ROHN | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 4284 | ROHN STATE LD | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 4285 | ROHR | Weld County, CO | Oil & Gas Property | Jan 2020 |
| 4286 | ROHR | Huerfano County, CO | Gas Property | Jul 2007 |
| 4287 | ROLAND X | Weld County, CO | Oil & Gas Property | Nov 2019 |
| 4288 | ROLES 1 | Garfield County, CO | Oil & Gas Property | Dec 2025 |
| 4289 | ROMERO | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 4290 | RONALD | Weld County, CO | Oil & Gas Property | Jun 2005 |
| 4291 | RONALD REA | La Plata County, CO | Gas Property | Nov 2025 |
| 4292 | ROPER | Logan County, CO | Oil & Gas Property | May 2024 |
| 4293 | ROSE | Montezuma County, CO | Oil & Gas Property | Aug 2011 |
| 4294 | ROSE | Yuma County, CO | Gas Property | Nov 2025 |
| 4295 | ROSE | Garfield County, CO | Oil & Gas Property | Dec 2025 |
| 4296 | ROSE RANCH | Garfield County, CO | Oil & Gas Property | Dec 2025 |
| 4297 | ROSE RANCH FEDERAL | Garfield County, CO | Oil & Gas Property | Dec 2025 |
| 4298 | ROSE-STATE | Yuma County, CO | Gas Property | Nov 2025 |
| 4299 | ROSENBERG 6-61-30-0 | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 4300 | ROSENBROCK | Adams County, CO | Oil & Gas Property | Jul 2018 |