Catherine Houston
| Challenge | Status | End | Votes | Entries | Players |
|---|---|---|---|---|---|
| Two Wheels Only | closed | 4 years, 1 month ago | 22000000 | 20258 | 6852 |
| Humans Outdoors | closed | 3 years, 11 months ago | 13200000 | 30720 | 7679 |
| Going Macro | closed | 3 years, 9 months ago | 13000000 | 28718 | 7140 |
| Backdrops of Cities | closed | 3 years, 3 months ago | 10600000 | 12215 | 6012 |
| Speaking Without Words | closed | 2 years, 10 months ago | 6900000 | 4266 | 4203 |
| From Up Above | closed | 2 years, 8 months ago | 11500000 | 9796 | 4840 |
| All Kinds of Leaves | closed | 2 years, 6 months ago | 12100000 | 26126 | 6520 |
| All Together | closed | 2 years, 1 month ago | 11500000 | 13476 | 4476 |
| Could Be A Painting | closed | 1 year, 11 months ago | 9000000 | 21218 | 5336 |
| My Favorite Band | closed | 1 year, 8 months ago | 6000000 | 5551 | 2754 |
| Photographer's Choice | closed | 11 months, 2 weeks ago | 69621 | 573 | 560 |
| Pools & Pool Toys | closed | 9 months ago | 4116634 | 1880 | 1742 |
| Photography Edits | closed | 6 months, 4 weeks ago | 8285168 | 12914 | 3172 |
| Using High Contrast | closed | 3 months ago | 9152258 | 9021 | 2925 |