Introduction:
Sonkar and Kaimur are the highest hills of Uttar Pradesh. They are located in the districts of Mirzapur and Sonbhadra respectively. The geographical features of these districts contribute to the presence of the highest hills in the state.

Explanation:
Mirzapur:
- Mirzapur is a district in Uttar Pradesh, located in the southeastern part of the state.
- It is bordered by the Sonbhadra district to the south, which is where the Kaimur hills are located.
- Mirzapur is known for its diverse topography, consisting of hills, valleys, and plains.
- The Vindhyachal Range, which extends from Madhya Pradesh to Uttar Pradesh, passes through Mirzapur.
- It is in this range that the Sonkar hills, the highest hills of Uttar Pradesh, are situated.
- The Sonkar hills provide a picturesque landscape and attract tourists interested in natural beauty and adventure activities like trekking and hiking.

Sonbhadra:
- Sonbhadra is another district in Uttar Pradesh, located in the southeastern part of the state.
- It shares its border with the Mirzapur district to the north.
- Sonbhadra is known for its rich mineral resources and diverse topography.
- The Kaimur hills, which are the highest hills of Uttar Pradesh, are located in Sonbhadra.
- These hills are part of the Kaimur Range, which extends into Bihar and Jharkhand as well.
- The Kaimur hills are characterized by their rugged terrain and dense forests, providing a habitat for various flora and fauna.

Conclusion:
The districts of Mirzapur and Sonbhadra in Uttar Pradesh are home to the highest hills in the state. Mirzapur is known for the Sonkar hills, while Sonbhadra is known for the Kaimur hills. These hills not only add to the natural beauty of the region but also offer opportunities for adventure tourism.