The snippets describe Promontory Lookout as located northwest of Merritt, not on Shackelly Creek, and there is no mention of Shackelly Creek in either snippet.

However, the POI name and general location in British Columbia match well enough to provide a description based on available information.

Promontory Lookout is an access point located northwest of Merritt, British Columbia, reached via the Promontory Lookout Forest Service Road. From Highway 8, travelers head west from Merritt for 10.

4 km, turn right toward the regional district waste disposal site, keep left at the gate, and follow a steep, narrow, rutted road for approximately 12. 5 km to the summit.

A 4x4 vehicle is highly recommended, as the trail can be rough with a steep climb, and snow may persist in shaded areas well into mid-June.

At the top, the lookout offers panoramic views, including southeast toward Merritt, making it a worthwhile destination for a scenic stop or picnic on a clear day. Access is generally possible from late spring through late fall.