From Mumbai, it is an 8 to 9 hours road journey. Local transport can be taken through Konduskar travels, Neeta travels or Raj travels. My visit to Kolhapur was for 2 days and I completely took advantage of these days to explore not only the Kolhapur city but also the excursion.
So here we start from,
Day 1 activities:
Alluring Mahalaxmi temple of Goddess Ambabai.
Encompassing Tulja Bhavani temple
Engaging Kaneri Math
Jyotiba temple
Pleasant panhala fort
Immensely build new palace (museum).
Day 1 points should start at 9:00am and ends by 7:30pm .
Day 2 activities:
Narsobawadi (Shree Narsimha Saraswati)
Sangli ganpati mandir famous for artistic construction.
Audumbar (datta temple) / Khidrapur temple (lord shankar)
Rankala lake famous for kolhapuri bhel
Finally, back in Kolhapur city for shopping.
Day 2 points starts early in the morning by 8:00am and ends by 7:00pm.
Travels buses are available by 10:00pm onwards for mumbai and various other cities.
Best time to visit kolhapur is from September to April (avoid summer).
Recommended restaurants for authentic kolhapuri veg/non-veg thali are Hotel Dehati, Hotel Manisha (Only Veg), Hotel Opal.
Local transport in the city is weak and time consuming so one can hire the car or can travel through a private vehicle.
So enjoy the trip and don't miss any point mention above.