Step 1: What is asked.
We need the place where the 6th Khelo India Winter Games were held from 20 to 26 January 2026.
Step 2: About the games.
The Khelo India Winter Games promote winter sports and find new talent in snowy regions.
Step 3: The need.
These games need high, cold, mountain areas with snow.
Step 4: The host.
The 6th edition was held in the Union Territory of Leh and Ladakh, which has ideal winter conditions.
Step 5: Remove others.
Darjeeling, Panaji, and Shimla were not the host this time.
Step 6: Conclusion.
So the host was Leh and Ladakh.
Answer: Leh and Ladakh