Mk I just played the thing myself. I dunno if there is more. There doesn't seem like any more of the game currently. But I might be missing something. Even if I kept double-checking all of the areas :p
When Ashfall is murdered and Sunstar tells you to go to Bushstep. Go to Bushstep (The cat all the way left of the camp, next to the med cat) and click on him (I'm pretty sure its a him, but I get genders wrong). He'll let you in that den just the one time (Unless you're blind) and you'll be able to get "detective equipment" including the map. It'll appear in the top right corner.
If you're blind, when you become an apprentice on the medicine cat path, go to Bushstep and he'll make you run an errand for herbs. You'll get the map then.
If you complete the first half of the achievement "Nightmares" (Going to Hawkfeather, Talking to Hawkfeather, Going to Beestripe, Talking to Beestripe for a long time) then come back to Hawkfeather, she'll point the way. Go that way and click the new arrow that pops up.
I love the slight detail in the customization where if you choose the same pelt color as Lilacpath's, Breezekit will say "You do too!" after she talks about how she looks like her mother. If you don't choose the same pelt color, she'll say "You look different though". It adds realism
Oh, Okay. Here is a screenshot, click where the white border is (I just equipted a random generated cat) The Black cat in there is Hollypaw. You could also go left if ya wanted to some see horses. :
