| 1901 | GUS LD | Adams County, CO | Oil & Gas Property | Jan 2026 |
| 1902 | GUSTAFSON | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 1903 | GUTHRIE | Adams County, CO | Oil & Gas Property | Jan 2026 |
| 1904 | GUTTERSEN | Weld County, CO | Oil & Gas Property | Jan 2026 |
| 1905 | GUTTERSEN | Weld County, CO | Oil & Gas Property | Jan 2026 |
| 1906 | GUTTERSEN FEDERAL STATE YY0 | Weld County, CO | Oil & Gas Property | Jan 2026 |
| 1907 | GWAA | Weld County, CO | Oil & Gas Property | Jan 2026 |
| 1908 | GWARDAR | Weld County, CO | Oil & Gas Property | Jan 2026 |
| 1909 | GYPSUM RANCH | Garfield County, CO | Oil & Gas Property | Jan 2026 |
| 1910 | H B 5 | Montezuma County, CO | Oil & Gas Property | Jan 2026 |
| 1911 | H W GRAY | Rio Blanco County, CO | Oil & Gas Property | Jan 2026 |
| 1912 | H-Y 20 | Weld County, CO | Oil & Gas Property | Sep 2017 |
| 1913 | H-Y 29 | Weld County, CO | Oil & Gas Property | Sep 2017 |
| 1914 | HA 4 | Montezuma County, CO | Oil & Gas Property | Jan 2026 |
| 1915 | HA 5 | Montezuma County, CO | Oil & Gas Property | Jan 2026 |
| 1916 | HA 6 | Montezuma County, CO | Oil & Gas Property | Jan 2026 |
| 1917 | HABEL | Adams County, CO | Oil & Gas Property | May 2019 |
| 1918 | HAGAR 5-64 15-16-1BHZ | Arapahoe County, CO | Oil & Gas Property | Jan 2026 |
| 1919 | HAGEMANN | Yuma County, CO | Gas Property | Jan 2026 |
| 1920 | HAGEMEISTER USX AA | Weld County, CO | Oil & Gas Property | Jan 2021 |
| 1921 | HAGEN | Garfield County, CO | Oil & Gas Property | Jan 2026 |
| 1922 | HAGEN | Weld County, CO | Oil & Gas Property | Jun 2020 |
| 1923 | HAGEN FEDERAL | Garfield County, CO | Oil & Gas Property | Jan 2026 |
| 1924 | HAGOOD | Rio Blanco County, CO | Oil & Gas Property | Jan 2026 |
| 1925 | HAHN | Weld County, CO | Oil & Gas Property | Dec 2017 |
| 1926 | HALE | Weld County, CO | Oil & Gas Property | Apr 2022 |
| 1927 | HALE | Weld County, CO | Oil & Gas Property | May 2023 |
| 1928 | HALE | Weld County, CO | Oil & Gas Property | Jan 2026 |
| 1929 | HALEY | Logan County, CO | Oil & Gas Property | Jan 2026 |
| 1930 | HALEY | Weld County, CO | Oil & Gas Property | Nov 2018 |
| 1931 | HALEY | Weld County, CO | Oil & Gas Property | Jan 2026 |
| 1932 | HALEY | Boulder County, CO | Oil & Gas Property | Jan 2026 |
| 1933 | HALEY LC27-7 | Weld County, CO | Oil & Gas Property | Jan 2026 |
| 1934 | HALL | Weld County, CO | Oil & Gas Property | Feb 2017 |
| 1935 | HALL 19 | Weld County, CO | Oil & Gas Property | Dec 2019 |
| 1936 | HALL 28 | Weld County, CO | Oil & Gas Property | Aug 2021 |
| 1937 | HALLER | Weld County, CO | Oil & Gas Property | Jan 2018 |
| 1938 | HAMBERT | Weld County, CO | Oil & Gas Property | Jun 2020 |
| 1939 | HAMILTON | Weld County, CO | Oil & Gas Property | Apr 2018 |
| 1940 | HAMILTON CREEK | San Miguel County, CO | Oil & Gas Property | Dec 2024 |
| 1941 | HAMM CANYON | San Miguel County, CO | Oil & Gas Property | Apr 2024 |
| 1942 | HAMMER 3 | Weld County, CO | Oil & Gas Property | Jan 2026 |
| 1943 | HANCOCK GULCH | Mesa County, CO | Gas Property | Apr 2008 |
| 1944 | HANDKE | Adams County, CO | Oil & Gas Property | Jun 2017 |
| 1945 | HANGS | Garfield County, CO | Oil & Gas Property | Jan 2026 |
| 1946 | HANKINS | Weld County, CO | Oil & Gas Property | May 2023 |
| 1947 | HANSCOME | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 1948 | HANSCOME | Weld County, CO | Oil & Gas Property | Jun 2024 |
| 1949 | HANSEN | Weld County, CO | Oil & Gas Property | Jul 2020 |
| 1950 | HANSEN STATE | Weld County, CO | Oil & Gas Property | Jan 2026 |
| 1951 | HANSON | Adams County, CO | Oil & Gas Property | Sep 2018 |
| 1952 | HANSON D 30-1 | Weld County, CO | Oil & Gas Property | Mar 2017 |
| 1953 | HANSTEDT 07U-01 | La Plata County, CO | Gas Property | Jan 2026 |
| 1954 | HARDAWAY | Adams County, CO | Oil Property | Dec 1999 |
| 1955 | HARDESTY | Weld County, CO | Oil & Gas Property | Mar 2018 |
| 1956 | HARDING | Yuma County, CO | Gas Property | Jan 2026 |
| 1957 | HARDING | Yuma County, CO | Gas Property | Jan 2026 |
| 1958 | HARDMAN | Weld County, CO | Oil & Gas Property | Oct 2018 |
| 1959 | HARDWICK | Yuma County, CO | Gas Property | Jan 2026 |
| 1960 | HARKER | Cheyenne County, CO | Oil & Gas Property | Jan 2008 |
| 1961 | HARKER RANCH MORROW UNIT(HRMU | Cheyenne County, CO | Oil & Gas Property | Dec 2025 |
| 1962 | HARKIS | Weld County, CO | Oil & Gas Property | Jul 2019 |
| 1963 | HARLEQUIN | Weld County, CO | Oil & Gas Property | Jan 2026 |
| 1964 | HARLEY | Cheyenne County, CO | Oil Property | Dec 2025 |
| 1965 | HARMON | La Plata County, CO | Gas Property | Jan 2026 |
| 1966 | HAROLD 6 | Weld County, CO | Oil & Gas Property | Jan 2026 |
| 1967 | HARPER | Weld County, CO | Oil & Gas Property | Jan 2026 |
| 1968 | HARPER | La Plata County, CO | Gas Property | Jan 2026 |
| 1969 | HARPER A21-6 | Weld County, CO | Oil & Gas Property | Jan 2026 |
| 1970 | HARPER LD21-6 | Weld County, CO | Oil & Gas Property | Jan 2026 |
| 1971 | HARPHAM | Washington County, CO | Oil & Gas Property | Sep 2021 |
| 1972 | HARRIS | La Plata County, CO | Oil & Gas Property | Nov 2014 |
| 1973 | HARRIS 38N-18HZX | Weld County, CO | Oil & Gas Property | Jan 2026 |
| 1974 | HARRIS FEDERAL | Weld County, CO | Oil & Gas Property | Jan 2026 |
| 1975 | HARRIS RWF | Garfield County, CO | Oil & Gas Property | Jan 2026 |
| 1976 | HARRISON | Kiowa County, CO | Oil Property | Nov 2025 |
| 1977 | HARRISON-SMITH | Rio Blanco County, CO | Oil & Gas Property | Jan 2026 |
| 1978 | HARRY PEARSON A | La Plata County, CO | Gas Property | Jan 2026 |
| 1979 | HARRY S CHIKUMA | Weld County, CO | Oil & Gas Property | Apr 2017 |
| 1980 | HARRY WILLIS | Huerfano County, CO | Gas Property | Jun 2025 |
| 1981 | HARSCH | Boulder County, CO | Oil & Gas Property | Jan 2026 |
| 1982 | HARSH | Weld County, CO | Oil & Gas Property | Nov 2013 |
| 1983 | HARSH H 26 | Weld County, CO | Oil & Gas Property | Mar 2017 |
| 1984 | HARVARD 0 | Weld County, CO | Oil & Gas Property | Jan 2026 |
| 1985 | HARVESTER | Weld County, CO | Oil & Gas Property | Apr 2016 |
| 1986 | HARVESTERS | Weld County, CO | Oil & Gas Property | Jan 2026 |
| 1987 | HARVEY | Weld County, CO | Oil & Gas Property | Jan 2026 |
| 1988 | HASSLER | Fremont County, CO | Oil Property | Dec 2025 |
| 1989 | HASSLER | Phillips County, CO | Gas Property | Aug 2022 |
| 1990 | HATHEWAY | Yuma County, CO | Oil & Gas Property | Jan 2026 |
| 1991 | HAUGEN | Adams County, CO | Oil & Gas Property | Jan 2026 |
| 1992 | HAWAII 4 | Las Animas County, CO | Gas Property | Jan 2026 |
| 1993 | HAWKINS | Mesa County, CO | Oil & Gas Property | Jan 2026 |
| 1994 | HAWKINS 5-61-2 | Weld County, CO | Oil & Gas Property | Jan 2026 |
| 1995 | HAWXHURST | Mesa County, CO | Oil & Gas Property | Jan 2026 |
| 1996 | HAY 4 | Elbert County, CO | Oil & Gas Property | Jan 2018 |
| 1997 | HAYES 33-9 5-3 | La Plata County, CO | Gas Property | Jan 2026 |
| 1998 | HAYMAKER | Weld County, CO | Oil & Gas Property | Jan 2026 |
| 1999 | HAYNES STATE | Phillips County, CO | Gas Property | Aug 2022 |
| 2000 | HAYS | Weld County, CO | Oil & Gas Property | Jan 2026 |