We booked this hike with Yellowstone Hiking Guides, (Josh and Emily), and we so pleased I can't say enough about the trip.
They are the nicest folks you ever want to hang with and their combined knowledge of the area impressed us all. We took the short day hike to the Lone Start Geyser and it was the coolest thing ever. Josh said we should wait for the next eruption and that it would be well worth it. He was right! This geyser erupted with a stream of water about 30 to 40 feet high for over 20 full minutes!!! Compared to Old Faithful, which lasts about three minutes, this was spectacular! They provided a great lunch and interesting conversation throughout the whole trip. they also provided all gear required for the hike, we showed up with our shoes on and a bottle of water for each off us, that's it, they handled everything. I can't say enough about how great a time we had! Will definitely call them again the next time we are in the area.