In addition to the bra-less shoe-less movement (right on!), thousands of hippie chicks sported some truly groovy hairstyles during those years.
To find out how modern-day women can capture a modern-day Woodstock 'do without looking like they're stuck in the '60s and '70s, we consulted celebrity hairstylist Riccardo Maggiore of Riccardo Maggiore Salon in New York City.
"Hippies are synonymous with universal peace, love and freedom," says Maggiore. "Therefore, hairstyles that are characteristic of this era are simple, comfortable and very natural and flowing."
Today, updated versions of those hippie styles are called bohemian or boho. This is more of a modern, chic look according to Maggiore with styles that are fun and flirty, yet still simple to create.
If you're a free spirit and want to create your own boho hairstyle, here are Maggiore's hippest hippie looks:
Natural, Flowing Waves: Perfect for women who have long hair looking to achieve a simple hippie hairstyle. You can create this natural, wavy look by allowing hair to air dry after washing and finger-combing through some mousse or shine cream. You can accentuate waves by flipping damp hair upside down and finger-combing in that position, then gently scrunching your hair before flipping your head upright again.
Long Bangs: Wearing long bangs with hair parted in the middle is another common way to achieve the natural look of hippie hair.
Loose Side Braid: Perfect for people with long hair. Gather hair at the base of the neck and make a loose braid. Use an elastic the same color as your hair for a softer look. Then, with fingers, tug and separate the braid all over so it becomes messy and uneven -- an important step in creating the updated hippie 'do.
Braid Accents: Braid about one-half inch of hair along each side and pull each braid back to meet in the middle of the back of the head. Fastening it in place is a great way for women with short hair to utilize the hippie braid look.
Maggiore says you can also add certain accessories for a modern hippie hairdo, like bandannas, headbands, handcrafted hair pins and hair sticks, flowers (flower power!) and feathers.
To use dress up your 'do, Maggiore says you can:
-- Place a scarf or bandanna across the top of the head then tie it underneath the back of the hair, at the nape of the neck. Choose any color or pattern that matches your outfit for a fun hippie vibe.
-- Accessorize your hair with flowers or little hair clips. If you choose to pull your hair back, leave long pieces flowing down over your shoulders.
-- Add a colorful headband across your forehead. You could even use a thin ribbon and tie it in the back of your head.
Want more fun, retro looks? Check out these outfits from San Francisco's outdoor music festival!