This climb starts from Brown's Lake. There are two ways to get to Brown's Lake. One makes it an easy enough day hike, and the other would probably require a backpack.
1) Brown's Creek Trail - Go west on Chaffee County 270 from US 285. You can just follow this road--all major intersections are well signed. You will come to a decent sized parking area with bathrooms. This is the trailhead. Follow the trail for approximately 6 miles up to the lake. About halfway up, you will pass a sign that says "Falls" pointing left. Although these falls are nice (and only a short trip), you want to go right at this junction. Doing Antero from this trailhead is really not feasible for a day-trip, because it is between 19 and 22 miles roundtrip (depending on the route you choose).
2) Follow the directions for the West Slopes route and follow the Baldwin Creek Road up and over the Antero-N. Carbonate saddle and back down to Brown's Lake.
From the west side of the lake, follow the road for a while. If you like, you can follow the road all the way up to the saddle, and meet up with the standard route. Otherwise, look for a distinct gully to your right as you follow the road while still below treeline. You will want to leave treeline and head northwest once the road reaches a clearing and begins to angle downhill a bit. Follow a small stream (in the early season at least) up into a small basin. Stick to the right side and head up to the broad, flat saddle area between Mt. White and Mt. Antero. From here, you can hike up the ridge in front of you to again join the standard route.
This is a fairly standard Sawatch Fourteener dayhike. Bring the 10 essentials and you'll be more than prepared for a summer hike.
Snowshoes and an ice-axe would probably be helpful in the winter.
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