DOLORES, COLORADO
Dunton Hot Springs
Legend has it that Butch Cassidy and the Sundance Kid carved their names on the bar at this 34-person retreat. Today Dunton's proximity to three major rivers and unlimited alpine trails, not to mention soothing orange-colored hot springs, makes it a prime destination for fly-fishermen and hikers.

ULTIMATE COMBO Hike 2,400 vertical feet on the Johnny Bull trail for 360-degree views of the San Juans, then treat your weary limbs to Trager therapy: A trainer shakes and bounces your arms, legs, and joints to train your brain to heal irate muscles.

PAIN VS. PLEASURE How you work up a sweat is up to you -- be it in the 106-degree springs or on a full-day hike -- but backcountry adventure abounds.

FOR THE GUY WHO Wants Wild West adventure in 21st-century style. Dunton's plush log cabins are restored 19th-century authentics.

BOOK IT Three-day packages from $1,050, including meals; 970-882-4800, duntonhotsprings.com

ST. GEORGE, UTAH
Red Mountain Spa
Big meets bigger at this godfather of adventure spas: Red Mountain's 82 rooms, 12 luxe suites, and 30,000-square-foot spa look out to the Mojave Desert and its red rock moonscape. Guests can explore the striated terrain and canyons on belay, foot, mountain bike, or even in a kayak. If you need more elbow room, the resort's 41 adventure guides also lead trips into nearby Bryce Canyon, Grand Canyon, and Zion national parks.

ULTIMATE COMBO After mastering the 5.9 Superfly climb in Crawdad Canyon's basalt-crafted climbing park, sign up for an Up Against the Wall Upper Body Massage, which uses anti-inflammatory oils and firm pressure to relax and stretch arms, shoulders, and backs for quick, one-day recoveries.

PAIN VS. PLEASURE If you want rugged, blood-pumping action, it's yours. But there's also a softer pool-and-tennis-court scene for slow days.

FOR THE GUY WHO Likes to try new sports and treatments -- every day.

BOOK IT From $239 a night, including meals; 800-407-3002, redmountainspa.com

ILHA GRANDE, BRAZIL
Body & Soul Adventures
Sandwiched between surf and rain forest on an island off Brazil's Costa Verde, B&S hosts 14 guests at a time for its six-day fitness-detox programs. Getting in shape is the top priority. Expect days packed with outdoor action, from jungle trekking to sea kayaking to surfing, along with minimal-calorie meals.

ULTIMATE COMBO After a day of catching waves at the deserted Lopes Mendes Beach, go for a shiatsu-style massage to work out postsurf kinks in your triceps, lats, hips, knees, and ankles.

PAIN VS. PLEASURE Strenuous is the rule: Come prepared for five-hour kayaking tours and 12-mile hikes.

FOR THE GUY WHO Likes to travel solo (about 75 percent of all B&S guests come alone) and wants to look more toned when he returns home.

BOOK IT $2,500 for a week, including activities and meals; 877-627-8431, bodysouladventures.com

TULUM, MEXICO
Amansala
Yes, this is the same Amansala whose "Bikini Boot Camps" draw packs of fitness-hungry women, but in recent years the eco-spa on Mexico's Riviera has started to lure a small but growing number of men. Join the scantily clad female crews for six days of alfresco exercise, including circuit training and sand sprints.

ULTIMATE COMBO Kayak-race your campmates a mile out to a reef -- then swim (all the way) back and duck into Amansala's new Temezcal, a Mayan sweat lodge that will ease your still-quaking delts and lats.

PAIN VS. PLEASURE You can ask the guides to break from the ladies for tougher kayak-racing and biking challenges but, FYI, the program is not so easy to begin with.

FOR THE GUY WHO Wants to blend beach fitness with meeting women who can handle themselves in the wild.

BOOK IT Rooms from $1,872 for a week, including activities and meals; amansala.com

STOWE, VERMONT
Topnotch Resort and Spa
When summer hits, Stowe thaws into a boundless arena of trails and streams, and guests at the year-round, 72-room Topnotch Resort take full advantage. Sign up for a hiking excursion with one of the resident guides or DIY with gear (canoes, fly-fishing rods, mountain bikes) from the resort's on-site rental center, the Nordic Barn.

ULTIMATE COMBO Loosen up with a Thai massage, then roll into nearby Ranch Valley's web of single- and doubletrack trails.

PAIN VS. PLEASURE Hardcore fitness seekers can sign up for the "Endurance" package, which structures each day with a personalized exercise program.

FOR THE GUY WHO Wants the adult version of the classic New England summer camp (with pampering).

BOOK IT Rooms from $335; 800-451-8686, topnotchresort.com

GREENOUGH, MONTANA
The Resort At Paws Up
Surrounded by 37,000 untamed acres of western Montana, this 80-person resort just added an 11-tent "spa town" to its community of luxury cabins and camping tents. Translation: Your double-zippered treatment "room" will open to the Bob Marshall Wilderness, where Lewis and Clark once wandered. Hit 120 miles of trails on foot, bike, or horseback, or fish the nearby Blackfoot River.

ULTIMATE COMBO Saddle up for a 3.5-mile ride past Lewis and Clark's Look Out Rock landmark, then opt for a deep-tissue sports massage to relieve your lower back.

PAIN VS. PLEASURE You can arrange more extreme trips with Paws Up's on-site outfitter, but most guys just hike and fish at their own pace.

FOR THE GUY WHO Takes a dose of luxury with his wilderness. (Hot tubs and flat-panel TVs grace most rooms.)

BOOK IT Tents $595 a night; four-to-eight person cabins from $450 a night; 800-473-0601, pawsup.com