(Portland, OR) -- A grand opening celebration will be held at the Gateway Green on Saturday in Northeast Portland. The 25 acre site at the junction of I-205 and I-84 was acquired by the city in 2014 and turned into a unique off-road cycling and hiking destination. The grand opening ceremony will be held at 10 a.m. and then the celebration continues until 2 p.m. There will be bike skills challenge stations, loaner mountain bikes, face painting, and other fun activities.