Abstract In Northeastern Oregon, weed infestations pose a major constraint on winter wheat ( Triticum aestivum L.) yield. A field study was initiated in October 2021 and conducted for three more years (2022, 2023, and 2024) to assess the potential of inter‐seeded legumes in continuous winter wheat on weed suppression and wheat yields. The four legumes studied were clovers ( Trifolium alexanderinum L. and Trifolium incarnatum L.), winter peas ( Pisum sativum L.), and common vetch ( Vicia sativa L.). Results varied across years, with clovers only surviving the winter in 2024. In 2022, the peas and vetch inter‐seeded with wheat and terminated at harvest did not reduce weed cover and reduced wheat yield by 94% and 64% compared to solo wheat (control), respectively. In 2023, peas inter‐seeded with wheat and terminated in mid‐May reduced weed cover but also reduced wheat yield by 53% compared to solo wheat. In 2024, solo wheat and wheat inter‐seeded with one of the clovers (terminated at harvest), or vetch or peas (both terminated in March), had similar yield (2116–2516 kg ha −1 ), but total weeds were not reduced. The use of legumes inter‐seeded with winter wheat showed some weed suppression, particularly in 2023. Differences in treatment effects among years were largely driven by inter‐seeded cover crop management, particularly whether cover crops were grown to maturity or terminated during the growing season. Selecting appropriate species and implementing early termination that permits biomass accumulation without undue competition with wheat will be essential.