Morchella frustrata is a species of fungus in the family Morchellaceae native to North America, commonly referred to as the mountain blond or western blond morel. It has conical, yellowish to tan fruit bodies that grow up to 6 cm (2.4 in) tall and 4 cm (1.6 in) wide. Described as new to science in 2012, it has been collected from California and Oregon, where it occurs in mixed forests. It has also been collected in Turkey, although it is unknown if its presence there is a result of an accidental introduction. The fruit bodies are 6–9 cm (2.4–3.5 in) high. The conical cap is 4–6 cm (1.6–2.4 in) high and 2.5–4 cm (1.0–1.6 in) wide at the widest point. The cap surface features pits and ridges, which are formed from the intersection of 16–22 primary vertical ridges and few shorter, secondary vertical ridges, with frequent, sunken, horizontal ridges. The cap is attached to the stipe with a distinct sinus about 2–4 mm deep and 2–4 mm wide. The smooth ridges are initially colored pale yellowish to nearly whitish when young, but turn pale tan in age.