For Girnar Jain Tirth:

• From the foothill (Taleti/Bhavnath) to the top (5th tonk / Dattatreya side), the full climb is considered about 10,000 steps.
• The main Jain temple complex / 1st tonk of Girnarji (Bhagwan Neminath temple area) is reached in roughly 4,000–4,400 steps from the base; from there, additional steps go further up to higher tonks.

So, for complete Girnar parikrama up to the top, keep ~10,000 steps in mind; for only the main Jain temples, about 4,000+ steps.

You can read a short Jain-focused explanation here