The route
From I-84, take exit 285 at North Powder, 19 miles north of Baker City or 24 miles south of La Grande. From there it's OR 237 for about 4 miles, then the Anthony Lake Highway (county-maintained, becoming national forest Road 73) for roughly 16 more paved miles west to the resort. The road is described by the Forest Service as narrow and winding. It is paved and maintained the whole way to the resort.
Winter access
The resort operates all winter, so the access road is plowed and maintained up to the resort and campground. The road continuing west past the lakes, deeper into the Wallowa-Whitman National Forest, is not maintained for winter travel and effectively closes. Chains or good winter tires are a sensible precaution regardless. It's a narrow, winding two-lane road at elevation.
Is the road to Anthony Lakes plowed in winter?
Yes, up to the resort. It operates all winter and the access road (the Anthony Lake Highway and Forest Road 73) is maintained that far. The road continuing west past the lakes into the national forest is not maintained for winter travel.
How far is Anthony Lakes from Baker City?
About 35 miles: I-84 north 19 miles to the North Powder exit, then about 20 miles west on OR 237 and the Anthony Lake Highway. From La Grande it's about 45 miles, via I-84 south 24 miles to the same exit.