If you move your mouse over a time/event on the calendar, you can click on it and get more details, often maps, and add them to your own calendar. You can also switch the view to month or week.
If you click on the +Google Calendar icon on the bottom right of the calendar you can use the calendar along with your own using google’s calendar function. You will need a google account (free). You can do the same with the non-Sierra Club calendar and overlay the two with your own google calendar.