BOSTON — When Boston 2024, the private group organizing the city’s bid to host the 2024 Summer Olympics, unveiled its plans in January, it boasted that it would put on “the most walkable Games in modern times.”

Well, spectators may find themselves on some awfully long walks.

In a striking about-face, the bid organizers are detouring from their promise of a compact Games and offering instead a plan that spreads the events across Massachusetts. While the International Olympic Committee had signaled that it would look favorably on sites clustered closely together in a small city like Boston — which would essentially serve as its own Olympic Park — the organizers ran into a buzz saw of complaints about many of its proposed venues, which had not been vetted with some of the landlords or the public. As questions mushroomed about the bid’s financials and what many considered Boston 2024’s lack of transparency, support in Boston for hosting the Games plummeted.

Now, in its determination to salvage its effort, Boston 2024 is preparing what it has called Bid 2.0. In the original plan, most of the venues were concentrated within six miles of one another in Boston and within a 10-minute walk of subways or commuter rail lines. In the next iteration, due by the end of the month, more sites will be sprinkled across the state and possibly the region.

Early polling suggests that this strategy may win more popular support for hosting the Olympics. But at the same time, it runs counter to the blueprint laid out by the I.O.C., which calls for future Games to be more compact.