Sunday turned out to be a perfect day to summit Sweeney Peak. Temperatures were mild and the wind was calm. My wife and I enjoyed one of the best views I've ever had in the Bitterroots, with Mt. St. Joseph dominating the southern horizon. We encountered some remnant snow, but nothing treacherous. Two other parties joined us on the top.
The route follows the Sweeney Creek trail for about two miles until it reaches a small spring that crosses the trail. At the spring, you'll find a primitive climber's path leading north up a little draw. Follow it about a quarter-mile to the crest of the ridge, then head west to the summit. Watch out on the loose boulders and scree. We saw one climber who'd fallen and gotten cut up pretty badly.
The round trip covered 10 miles and climbed 3,500 vertical feet, taking us about seven hours.