The battle over management of Colorado's 4.4 million acres has abruptly intensified, after years of federal intervention, state resistance and legal wrangling dating back to the final days of the Clinton administration. At stake, according to a coalition of environmental groups fighting to protect roadless areas, is whether wide swaths of relatively unscathed national forest will be made more accessible to motorized vehicles, allowing incursion by logging companies, oil and gas drilling, construction of water pipelines and power transmission lines, and expansion by the state's ski industry.