Resistivity and magnetostriction measurements were performed at high magnetic fields and under pressure on UCoAl. At ambient pressure, the 1st order metamagnetic transition at H m ∼0.7 T from the paramagnetic ground state to the field-induced ferromagnetic state changes to a crossover at finite temperature T 0 ∼11 K. With increasing pressure, H m linearly increases, while T 0 decreases and is suppressed at the quantum critical endpoint (QCEP, P QCEP ∼1.5 GPa, H m ∼7 T). At higher pressure, the value of H m identified as a crossover continuously increases, while a new anomaly appears above P QCEP at higher field H * in resistivity measurements. The field dependence of the effective mass ( m * ) obtained by resistivity and specific heat measurements exhibits a step-like drop at H m at ambient pressure. With increasing pressure, it gradually changes into a peak structure and a sharp enhancement of m * is observed near the QCEP. Above P QCEP , the enhancement of m * is reduced, and a broad plateau is found between H m and H * . We compare our results on UCoAl with those of the ferromagnetic superconductor UGe 2 and the itinerant metamagnetic ruthenate Sr 3 Ru 2 O 7 .