EDITOR’S NOTE: This is the third in a three-part series about vacations under $700.

We hit the road at 8:30 a.m. in my sister’s Mustang, headed for the historical spa town of Berkeley Springs, W.Va., to get as relaxed and well-fed as two busy gals could manage on a one-night, post-Christmas getaway.

I’d never been to a spa, and I don’t normally seek out beauty treatments (my haircuts tend to be rushed trims over the bathroom sink rather than sessions with hip stylists), but a day of pampering seemed like the perfect sisterly bonding trip. And with a budget of $669.66, we figured we couldn’t afford not to feel like princesses for a day.

Our first stop in town: Berkeley Springs State Park, where George Washington “took the waters” and Lord Fairfax had his own private spring.

At the state park’s white-brick Roman Bathhouse, we booked the next available slot for a two-person soak in a Roman bath, paid our $30, then browsed a few nearby antiques shops while the bath attendant filled our tub.

Inside the bathhouse, which has been in use for more than 75 years, are nine narrow rooms with blue-tiled Roman baths, 5 feet wide and 9 feet long. They are filled 4 feet deep with 102-degree mineral water pumped in from the springs that run through the park, giving off steam as they course through stone-lined channels. Opting to share one tub so we could chat, my sister and I threw on our swimsuits and climbed gingerly into the piping-hot water. The tubs are just big enough for stretching out, maybe a little swimming, but the hot water and small space, even after we cranked open the window, had us sitting on the edge rather than floating.

We’d paid for only a half-hour soak, but since there were few bathers there, the attendant let us stay as long as we wanted; no wonder we felt like boiled lobsters when we finally left, almost an hour later. $639.66 left.

I filled my water bottle at the park’s public taps next to the bathhouse, taking my cue from the bundled-up locals filling their plastic water jugs there. The water is sweet and filled with minerals, and a few companies sell bottled Berkeley Springs water.

Back in the Mustang, we cruised down Washington Street (aka Route 522) to take in the countryside, driving past churches dolled up for Christmas, a shuttered Dollar General store, a water-bottling plant and roads that angled precipitously up the mountains on both sides of the street. Then, our stomachs growling, we headed back to town.

We checked into the Country Inn, a Depression-era red-brick hotel with an attached spa, a restaurant and manicured gardens that abuts the state park Taking advantage of the inn’s on-site spa, we’d booked the $360 Supreme Spa Experience package: massages, facials and one night’s lodging for two, plus four $10 vouchers for on-site dining in one of the four dining rooms. $279.66 left.

We decided to eat lunch in the sunny West Virginia Room, where a crock of cheesy French onion soup, a BLT with a side of crispy shoestring sweet potato fries, a crab cake sandwich with a hint of curry, iced tea and a slice of cheesecake used up all four meal vouchers.

Before our afternoon of pampering began, I popped across Washington Street to the bank to pick up tip money for our facials, massages and pedicures ($10 per treatment; a 15 to 20 percent tip is standard). Rates at the Country Inn’s Five Senses Spa are similar to those at other spas in Berkeley Springs but lower than at most day spas in Washington: $65 for a 45-minute European facial, $60 for a 45-minute massage. For even more pampering, we each added a $45 pedicure, which included a whirlpool foot bath, exfoliating scrub and a couple of coats of peppy nail polish. $129.66 left.

First up: the facial, which involved having my hands and feet massaged with almond oil, encased in plastic wrap and tucked into heated mittens and booties; then having a series of sweet-smelling potions massaged on my face, which kept getting wrapped in hot, wet towels while soothing flute music played in the dimly lit room. I drifted in and out of consciousness, and when my sister and I met up afterward, we were both a little glazed over and totally relaxed.

Then came the massages.

Four hours after we walked in the door, we’d both been scrubbed, rubbed and coddled and, admiring our pretty painted toenails, we slipped downstairs to our room, spacious and done up in red and white, with fluffy down duvets on roomy double beds. We basked in our blissed-out state until it was time to dress for dinner. A girl could get used to this.

There was heavy rain as we drove up the mountain to Panorama at the Peak, a 3-year-old restaurant on the site of the old Panorama Steakhouse, about 3 1/2 miles west of Berkeley Springs on winding Route 9. The new iteration is a locavore’s dream: Almost all ingredients are local, and many are organic. Owners Patti Miller and Leslie Hotaling have partnered with nearby growers such as Upperville’s Ayrshire Farm, which supplies meats and vegetables.

The restaurant is across the road from a scenic overlook that has been heralded as one of the best in the East, with a view of the Potomac and Cacapon rivers in the valley below.

Or so I heard; all I could see through the rain and fog were a few lights, even from our table right next to the window-lined wall.

But the lack of a view was offset by our food: spinach-artichoke dip, filet mignon with sour cream mashed potatoes, pot roast with veggies, crème brûlée, raspberry bread pudding and organic chardonnay. We rolled out to the car $100 lighter and so stuffed that, back at the Country Inn, we both fell asleep the minute we pulled up our fluffy comforters. $29.66 left.

When we woke up at 7 the next morning, we were starving. Maybe it was all that pampering from the day before.

Rather than eating again at the hotel, we strolled across the park to try the Fairfax Cafe, where breakfast (bacon, egg-and-beans wrap, goat cheese quiche) was underwhelming, the only disappointing meal we’d had the whole trip. $9.16 left.

Checking out of the Country Inn, we snagged free coffee and tea in the lobby before heading back to the city, hoping our nail polish would stay unchipped and our shoulders knot-free until our next spa getaway.

IF YOU GO

WHERE TO STAY: We enjoyed our big double room at the Country Inn (110 S. Washington St., 1-866-458-2210, www.thecountry innatberkeley springs.com), where we got one night’s lodging and spa treatments for two at the attached spa for $360. Regular rooms start at $69.

WHERE TO EAT: We had lunch in the Country Inn’s West Virginia Room, feasting on soup, sandwiches and cheesecake (using our $40 in food vouchers). That evening, we splurged at Panorama at the Peak with filet mignon and pot roast, True Earth’s organic chardonnay and Paul Newman’s organic chardonnay. Next time I’ll check out local favorite Earthdog Cafe (398 S. Washington St., 1-304-258-0500), which serves breakfast as well as barbecue.

WHAT TO DO: We soaked in a Roman bath at Berkeley Springs State Park (2 S. Washington St., 1-304-258-2711 or 1-800-225-5982, www.berkeley springssp.com), which costs $20 for the first person, $10 for the second same-sex adult for a 30-minute soak. The Country Inn’s Five Senses Spa has room-and-spa packages starting at $180 for one weeknight’s stay, plus a mineral whirlpool bath, choice of a massage or facial and a $10 dining voucher. Other treatments available are body wraps and scrubs, waxing, nail care, reiki and stone therapy.

FOR MORE INFORMATION: Travel Berkeley Springs, 1-800-447-8797, www.berkeleysprings.com.

Gayle Beshears, Cathleen Meadows, and Robert Shonkwiler at JDRF Photo by LINDA NAVARRO/THE GAZETTE