The author conducted a natural field experiment on conditional cooperation where cross-country skiers in two Swedish ski resorts were faced with the decision of whether or not to contribute to ski track funding. Ski-tracks in Sweden are public goods and it is not legal to charge for access to such facilities.The results indicate those who a higher share of the treatment group contribute (25%) than the control (21%). The share of subjects contributing to be significantly greater in the group receiving information about others’ behavior than in the group that does not.