Yup, registrations for Tri's are steeper than running races. The sprint I did here was around $95 (last minute) and the HIM I did was about $110 (super-early discount). The IM was $500 when you add the stupid $25 Active fee (why THAT is more, I do NOT understand) and there is no early registration discount for those since they all sell out, usually withing a few weeks of opening registration 1 year in advance of the event. And then you need to join USAT either annual membership or a 1-day membership if the events are USAT-sanctioned (I've heard horror stories about some that are NOT.) The reasons for the cost increase are the additional permits and road closure support due to the bike leg, lifeguarding and emergency teams for the swim. Overall, the course covers more ground which takes more cones, signs, insurance, volunteers (still costs $$ to give someone a t-shirt, lunch, water, etc), traffic control, timing mats, etc.