You don't have a problem, but you can examine Possibles.

1. Water pump failing
2. Pulleys/belt slip/stretch
3. The radiator you think is not clogged
4. Hose collapse
5. Cap failing
7. Low oil
8. Too much antifreeze
9. Faulty gauge. Based on the fact you don't say it boiled over
10. Timing set
11. Fan blade set at 1/2" clearance to Rad
12. Normal. Based on the fact you don't say it boiled over. 210 is not dangerous with no boil over- 7 lb cap/Sea level. You are at 167 feet above.You are OK. Don't go past 230 F. Run high idle to cool, when stuck at McDonalds. That works. You are in the 100 deg range at your location. Official temperatures are taken in the shade.


Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn