Thieves have broken into the premises at Laggan Wolftrax (about 35 miles east of Fort William) and stolen over £50,000 worth of bikes.
Twenty bikes worth a total of more than £50,000 have been stolen from premises at a Cairngorms mountain bike trail.
Eight hire bikes were stolen from a community enterprise at Laggan Wolftrax Visitor Centre and 12 from The Wee Bike Hub bike shop, also at the centre.
Thieves cut power to the centre in the incident which happened overnight on 15 and 16 January.
Laggan Forest Trust said lockdown demand for bikes would make it hard for it to replace the stolen hire bikes.
Eight of its Polygon Siskiu T8 bikes, estimated to be worth £12,800, were stolen between 23:00 on 15 January and 03:00 on 16 January.
At the same time, 12 bikes of various makes and models and estimated to be worth a total of £39,500, were stolen from The Wee Bike Hub along with £3,100-worth of clothing.