I just cycled the whole Glenmore Reservoir loop. I'd say it's 80% clear of snow with the exception of Weaselhead flats and the odd patch here and there that doesn't get much sun. The hill that enters the south end of Weaselhead flats is very icy and treacherous. I don't have studded tires and had to walk my bike down it hanging on to the railing (my shoes aren't the best either). The flat section of Weaselhead flats is bumpy... REALLY bumpy hard packed snow. Biking that stretch will test how well your tooth fillings are set

but totally rideable with a mountain bike or a gravel bike with good/studded tires. Rest of the loop is smooth sailing, just the odd patch of slush or puddles. I took some pictures of the worst sections.
The hill down to South Weaselhead flats:
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Weaselhead Flats pathway:
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