This might be the outlet stream to Shadow Lake.
Digitized from film. Digitization information:
Date: 2025:09:16 20:41:40
    File: wCan_Rockies_1979_008.jpg
Camera: PENTAX K-5 -- Lens: smc PENTAX-D FA Macro 100mm F2.8 WR at 100.0 mm -- Exposure: 1/30 f/2.8 ISO 100