Is a Eurail pass worth it for 3 months?

Only if you plan on traveling between countries at least twice a week. Otherwise, point-to-point tickets booked 3-4 weeks in advance are often cheaper.

How do I avoid burnout?

Schedule two 'do nothing' days every 10 days. Don't plan activities; just do laundry, grocery shop, and relax.

Planning a 3-Month Europe Trip

Planning a 90-day trip requires balancing the Schengen Area's 90-day limit with a realistic pace that avoids burnout. Map your route by grouping countries geographically and scheduling rest days every 4 days to maintain your energy.

Check your visa constraints. Most travelers are limited to 90 days within the Schengen Area in a 180-day period. Use a Schengen calculator tool online to confirm your exact exit date before booking flights.
Build a 'hub and spoke' route. Pick 6 major cities to serve as your home bases for 2 weeks each. Spend your weekends in these cities and use the weekdays for short train trips to surrounding towns.
Prioritize one region per month. Don't try to see the whole continent. Spend month one in Southern Europe (Mediterranean), month two in Central Europe (Alpine/Germanic), and month three in Northern or Western Europe to manage travel fatigue.
Book your arrival and departure flights first. Book an 'open-jaw' ticket—flying into your first city and out of your last—to save time and money on backtracking.

Is a Eurail pass worth it for 3 months?: Only if you plan on traveling between countries at least twice a week. Otherwise, point-to-point tickets booked 3-4 weeks in advance are often cheaper.
How do I avoid burnout?: Schedule two 'do nothing' days every 10 days. Don't plan activities; just do laundry, grocery shop, and relax.