Photo by Nico Smit on Unsplash
Four days in the mountains of central Idaho. Start in the ski town of Ketchum and the resort town of Sun Valley, drive the Sawtooth Scenic Byway over a high pass to alpine lakes below the Sawtooth peaks, then take a long road to a black lava field.
From average weather, 2021 to 2025: days that are warm but not hot, with few rainy days, score highest. Crowds and prices change through the year, so check them before you book.
How much walking? On foot, about 1.3 to 2.2 miles a day, and 156.5 miles by car in all across 4 days. Distances are straight-line estimates, so allow extra for the streets.
A gentle first day at altitude. Walk the small streets of Ketchum, drive the short way to the resort town of Sun Valley, then look up at Bald Mountain, the peak above both towns that most people call Baldy.
Fluffy pancakes with the purple mountain berry of the region, huckleberries, served with butter and syrup, a hearty start to a day at altitude.
Local tip Huckleberries are tart and sweet at once, so ask for the syrup on the side.
A small city in the Wood River Valley, first a mining town named for a trapper and guide, now a base for fishing, hiking, galleries and trail riding. Walk the streets slowly at this height, and look up at the mountain.
Go when Morning, before the day warms, or in the evening (about 9:16 PM).
Local tip Walk a few streets and look up at the mountain. You are high, so the sun is strong and the nights are cold. Carry water and a layer even for a short stroll.
A resort town and ski resort beside Ketchum, in the same valley. The region came to public attention in the late 1930s, when Ernest Hemingway visited. In summer it is a town for walking, cycling and eating outdoors.
Go when Midday, as an easy stop between the town and the mountain.
Local tip The resort is a town to wander, not a list of sights. Take a walk or a slow ride on the paths, and ask at a visitor desk what is open that week.
A big baked potato, split and loaded with butter, sour cream, cheese and chives, the state vegetable in its simplest form.
Local tip Share one if you are not hungry, since they are large.
The main ski mountain of the resort, about 9,100 feet at the top, rising right beside Ketchum. In summer it is a hill of trails and open slopes, with views over the valley. Check ahead on which lifts and trails are open, and carry water and a layer.
Go when Afternoon, with the valley in clear light.
Local tip Choose a short walk on the lower slopes or stop at the base and look up. Thunderstorms build on summer afternoons, so turn back if the sky darkens. Check ahead on what is open.
A whole or filleted trout from a mountain stream, pan-fried and served with potatoes and a squeeze of lemon, a dish of the high lakes and rivers.
Local tip Ask whether the fish is local or farmed, and mind the small bones.
The first push into the Sawtooth Recreation Area. Start at its headquarters just north of Ketchum, climb the Sawtooth Scenic Byway over Galena Summit, then drop into the Sawtooth Valley to a lake. A long road, so check ahead on the road and the weather.
Shredded potato fried crisp on the outside, soft inside, with eggs and toast, an Idaho breakfast to carry you over the pass.
Local tip Ask for the hash browns well done if you like them crisp.
A national recreation area of mountains, lakes and wilderness, set up in 1972 and run by the Forest Service as part of Sawtooth National Forest. Its headquarters stand on Highway 75 north of Ketchum, a good place to ask about road, trail and bear news before you climb.
Go when Morning, before you climb the byway.
Local tip Stop at the headquarters to ask about the road, fires, smoke and bears. Rangers know which trails and side roads are open this week, so use them before you set off.
A high mountain pass on the Sawtooth Scenic Byway, at about 8,700 feet. A little west of the summit a viewpoint looks over the Sawtooth Valley and the peaks beyond. It is cold and windy up here even in summer, so take a layer.
Go when Midday, with the view clear.
Local tip Stop at the viewpoint a little west of the pass and look over the valley. It is cold and windy even in July, and storms can build quickly. Check ahead on the road and the weather.
Sandwiches, fruit and trail snacks eaten at a lake, since there are few places to eat along the byway.
Local tip Buy it in Ketchum before you climb, and carry more water than you expect to need.
An alpine lake in the south of the Sawtooth Valley, reached by a side road off Highway 75, with an easy shore on its north side. Walk the water and look at the peaks across it. Check ahead on the side road and on any fire or snow closure.
Go when Afternoon, when the water is calm.
Local tip Take the side road to the shore and walk the north side. The water is cold, and the side road can be rough or closed. Check ahead on the road and on smoke or fire closures.
A burger of elk or bison on a bun with onion and cheese, a meat of the high plains and the mountains.
Local tip Ask for it cooked through, and add a side of fries.
Deep in the Sawtooth Valley. The largest lake in the recreation area, then the small mountain town of Stanley, then an alpine lake west of town under the peaks. A night in the valley saves a second long drive, so check ahead on where to sleep and on the road.
A mug of hot chocolate and something baked, to warm up on a cold morning by the lake.
Local tip Nights are cold even in summer, so take a flask for the shore.
An alpine lake just south of Stanley, the largest lake in the recreation area, named for the red sockeye salmon that once filled it at spawning time. The shore is open for walking and boating. If a sockeye is caught it is released, so check the fishing rules.
Go when Morning, before the wind rises on the water.
Local tip Walk the shore and look at the peaks across the lake. The water is cold and can turn rough, so keep boats close to shore. Store food away from bears and check ahead on the fishing rules.
A small town in the Sawtooth Valley, a gathering place for a thinly settled region. The sky here is part of the Central Idaho Dark Sky Reserve, so the stars are clear on a cloudless night. Services are few and far between, so fill the tank and the water bottle.
Go when Midday for a stop, or after dark (about 9:16 PM) for the stars.
Local tip It is a small town in a big valley, so fill the tank and water bottle here. On a clear, moonless night the sky is dark enough to see the Milky Way. Check ahead on smoke.
A baked potato with butter and a bowl of hot soup, a plain lunch in a small mountain town.
Local tip Eat when you can, since services in the valley are few.
An alpine lake about seven miles west of Stanley, at the foot of the Sawtooth peaks, reached by a short spur road off Highway 21. Walk the shore, look at the peaks and leave in good light. Check ahead on the spur road and on smoke.
Go when Afternoon, then leave in good light.
Local tip Take the spur road off Highway 21, walk the shore and look at the peaks above. Mind the cold wind off the water, and check ahead on the road and on smoke or fire closures.
A bowl of beef chili, then a slice of huckleberry pie with a flaky crust and purple filling.
Local tip Ask for a scoop of ice cream on the pie, ideally huckleberry.
A day on its own, away from the mountains. A long road across the Snake River Plain to a black lava field of cones, tubes and tree molds. Check the road and the weather before you set out, and carry water, since there is little shade.
A warm wrap of eggs, potatoes and cheese with coffee, easy to eat in the car before a long road.
Local tip Fill a water bottle, since the lava field has no shade and few places to drink.
A national monument and preserve on the Snake River Plain, with a large lava field, more than 25 volcanic cones, lava tubes and tree molds, left where trees burned in the lava. It sits at about 5,900 feet with little shade. Check ahead on the road, the weather and what is open.
Go when Morning, as early as you can, before the lava heats up.
Local tip It is a long road, so check the road and the weather before you set out. There is little shade or water on the lava, so carry plenty of both, wear sturdy shoes and keep to the marked trails.
A stop on the loop road inside the monument, where a short trail winds across the broken lava. Wear sturdy shoes, since the rock is sharp, and take a hat and water. Check the park signs for the trail and any closure.
Go when Midday, with a hat and water.
Local tip Follow the trail across the broken lava and read the signs along it. The rock is sharp and the sun is strong, so wear sturdy shoes and carry water. Stay on the trail.
Sandwiches, fruit and nuts eaten at a picnic table or in the car, since food is hard to find near the lava field.
Local tip Pack out your rubbish, and keep food away from ground squirrels and birds.
Small cones on the Great Rift, built where blobs of molten lava piled up around a vent. The monument is known for its spatter cones. Stay on the marked trail, since the lava is sharp and the ground can be hot in the sun.
Go when Afternoon, before the heat peaks on the black rock.
Local tip The cones are small and close to the trail, so look but do not climb. The black lava soaks up the sun and the ground can be hot. Stay on the marked path and check ahead on closures.
A burger and fries, then a cone of ice cream flavored with huckleberries, in a small town on the road home.
Local tip Buy a scoop and eat it before it melts in the evening heat.
By average weather from 2021 to 2025, June to September are the most comfortable months for walking around Ketchum. This plan is built for july to September, which is one of the best months. Crowds and prices change through the year, so check them before you book.
It covers 4 days in Ketchum, planned for july to September. Each day is built around a small number of stops, with room to rest.
It was planned for most travelers. The pace and the places reflect that, so check it fits how you travel.
No. Places marked "book ahead" need a reservation. Hours, prices and availability change, so confirm before you go.
Yes. Archie drafts a day by day plan for your dates and takes your pace, the weather and who is travelling into account. You can start one from the Archie app.
Yes. It is a starting point you can change to fit your own trip: swap a place, add a day or move the pace.
On foot, about 1.3 to 2.2 miles a day, and 156.5 miles by car in all across 4 days. Distances are straight-line estimates, so allow extra for the streets.
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A trip idea · Updated November 2026
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