First off, I am very glad you did not get bitten!
Secondly, where is Garden Valley? Im in Sac . . .
I know a thing or 2 about rattlesnakes, and if you are in northern pacific(or Crotalus oreganus) rattelesnake country, you are very lucky you didnt get bitten.
If you are down south more, the S pacific is just as nasty, but there are also of a handful more of less dangerous species to run into down there.
The Northern has the 2nd worst venom, drop for drop toxicity, only behind the mojave.
The diamondbacks are just big and pump ALOT of venom.
Rattlers are waking up right now, looking for food, and looking for mates.
They will give birth in the late summer/early fall to about a dozen or so live babies.
If you saw a small one, it is probably last seasons young, do you know how many buttons were on its rattle?
A baby snake will shed about every 1-2 months, and gets a new rattle each shed, by the time its about 2-3 yrs old, it is full grown and sheds maybe 1-2x a year, still getting a new button each shed.
I keep 3 different species as pets, including 2 northerns I caught as babies 3yrs ago.
Rattlesnakes are beautiful and useful creatures, and would really rather eat a rat or mouse than a chicken.
They are also very dangerous animals, and some of the species in Ca can kill a person for sure.
I think the gopher snakes and rattlesnakes are the best rodent control out there.
Some fun facts:
A large, older rattlesnake would wayy rather get away from you than bite you.
It is a huge tax on their body to produce venom, and an older wiser snake knows its value.
You are 5x more likely to get a dry bite from a large snake, than from a smaller snake.
Rattlesnakes are VENEMOUS, producing an injectable venom, they are not poisonous, you can eat them and not get poisoned.
Some rattlesnakes have nuerotoxins, some have hematoxins, the nasty few have both.
Rattlesnake TASTES GREAT, just like chicken!!!
I like rattlesnakes . . .
I cannot fault anybody for killing a rattlesnake close to their house.
If you have a dog, Id invest in the vaccine, it works miracles.