This study investigates the forage productivity, feed value (caloric), and heavy metal content of selected taxa of the genus Trifolium L. (Fabaceae) distributed in the high mountain pastures of Çamlıhemşin (Rize, Turkey). Fieldwork was conducted during the flowering period of 2013–2014 in the Verçenik, Gito, Kavron, Çeymakçur, Elevit, Incesu and Çat plateaus. Five commonly occurring taxa (Trifolium pratense, T. repens, T. ambiguum, T. spadiceum, and T. canescens) were collected, herbarized, and analyzed. Productivity and hygroscopic moisture content were determined by biomass sampling, while caloric values were measured with a bomb calorimeter. Heavy metal concentrations (Al, Cd, Pb, Ni, Cr, Cu, Fe, Zn, Mn, Co) were quantified using ICP-OES after wet digestion. Results indicated that T. canescens and T. ambiguum exhibited the highest productivity and moisture content, whereas T. spadiceum showed the lowest. Caloric values ranged between 4369–4714 J/g in 2013 and 17.729–20.209 J/g in 2014, with T. pratense and T. canescens recording the highest values. Significant interspecific and interannual differences were observed in heavy metal concentrations, with T. pratense generally accumulating higher levels of Al, Fe, Cu, Cr, Ni, Pb, and Co, while T. repens showed higher Mn and Zn content. These findings confirm that Trifolium species are valuable forage resources in the region, though variability in heavy metal accumulation highlights the importance of monitoring ecological and anthropogenic impacts on high-mountain pastures.