| 1921: |
14 acres along Lake Koronis are purchased by the Evangelical Church for its assembly grounds |
| 1922: |
The Tabernacle and Lakeview Dormitory is erected; first summer assembly held |
| 1936-1937: |
Hillside Dormitory is built for $6,216; the white chapel is built for $2,176 |
| 1946: |
The Evangelical United Brethren Church is formed and continues governance of LKAG |
| 1954: |
40 acres for Camp Koronis (children’s summer camping) are purchased for $1,900; the lodge at Camp Koronis is built for $9,300 |
| 1960: |
Family camping begins at Lake Koronis Assembly Grounds |
| 1963: |
The camp's dining room is remodeled |
| 1968: |
The United Methodist Church is formed and continues governance of LKAG |
| 1971: |
50th anniversary celebration |
| 1974: |
LKAG is approved as an accredited site by the American Camping Association |
| 1975: |
Retreat Center is built for year-round retreats and conferences |
| 1982: |
The Tabernacle is remodeled and the iconic window installed |
| 1985: |
LKAG purchases former KOAC land and adjoining property, bringing the total acreage to 200 |
| 1997: |
75th anniversary celebration |
| 1998: |
A new indoor recreation building is constructed |
| 2003: |
A new retreat lodge is added, providing 19 more winterized rooms. It is the first new housing built since the Retreat Center |
| 2006: |
Lake Koronis Assembly Grounds changes its name to Koronis Conference & Retreat Center |
