In the US - it's really hard to be where I live, "South bay" near san francisco. It's Silicon valley, which means the towns around Stanford/Palo Alto.

Pros:
- TRUE year-round riding. It never really snows here, and stays sunny year round. Rains just enough in the spring (only) to have good tree cover, unlike LA/San Diego, which are mostly bereft of tree cover. You can't really compare Boulder or or other lovely areas as many other places have inclement weather (snow or heat) that shut down cycling for several months of the year. As lovely as those places are, some cycling >>> no cycling, even if it's just for a month.
- Mountains galore.
- HUGE cycling community. Even bigger than San diego or LA. There are lots of riders year-round, and when it's spring/summer and 75F out, there will be so many riders on the main roads that they will easily outnumber cars.
- Great roads for riding - very low traffic but mostly not so isolated that you feel desolate.

CON
- There is only one con, but it's a big one. It's hella expensive to buy/rent real estate here. Not NYC bad, but pretty much more expensive than any other suburb-type place in the US.


Ok, I guess there's on more con for all you Strava users. Cycling is so popular here that all the real climbs are absolutely stacked with professional-level results in the leaderboard. Unless you're a national-level pro, forget about KOMing any of the real climbs here.