Multiple Ascent List for Sean MathiasPeaks Climbed more than OnceThe Days column shows the number of distinct days the peak has been summited. The Total column shows the total number of ascents, which may include ascents on the same day. The Elapsed column shows how much time has passed between the first and most recent ascent of that peak.
| Peak or Point | Elev-ft | Location | Days | Total | First Ascent Date | Most Recent Date | Time Elapsed |
| Mount Si | 4180 | USA-WA | 19 | 19 | 2009-05-08 | 2018-05-15 | 9 Years, 7 Days Later |
| West Tiger Mountain #3 | 2522 | USA-WA | 9 | 9 | 2010-01-24 | 2018-02-07 | 8 Years, 14 Days Later |
| Mailbox Peak | 4841 | USA-WA | 7 | 7 | 2009-05-16 | 2018-11-18 | 9 Years, 186 Days Later |
| Mount Teneriffe | 4788 | USA-WA | 5 | 5 | 2009-05-23 | 2018-02-19 | 8 Years, 272 Days Later |
| Ingalls Peak | 7662 | USA-WA | 4 | 4 | 2012-07-13 | 2018-06-08 | 5 Years, 330 Days Later |
| Mount Ellinor | 5920 | USA-WA | 3 | 3 | 2009-08-05 | 2010-08-05 | 365 Days Later |
| Rattlesnake Ledge | 2040 | USA-WA | 3 | 3 | 2009-09-19 | 2010-06-19 | 273 Days Later |
| The Tooth | 5604 | USA-WA | 3 | 3 | 2010-07-11 | 2018-05-12 | 7 Years, 305 Days Later |
| Mount Washington | 4400 | USA-WA | 2 | 2 | 2009-06-18 | 2017-12-31 | 8 Years, 196 Days Later |
| Bandera Mountain | 5241 | USA-WA | 2 | 2 | 2009-07-08 | 2010-02-21 | 228 Days Later |
| Mount Pilchuck | 5340 | USA-WA | 2 | 2 | 2009-08-01 | 2015-05-30 | 5 Years, 302 Days Later |
| Mount Saint Helens | 8333 | USA-WA | 2 | 2 | 2009-08-28 | 2017-05-07 | 7 Years, 252 Days Later |
| Yellowjacket Tower | 4140 | USA-WA | 2 | 2 | 2010-05-22 | 2018-05-19 | 7 Years, 362 Days Later |
| Mount Baker | 10781 | USA-WA | 2 | 2 | 2010-06-11 | 2014-07-12 | 4 Years, 31 Days Later |
| Bedal Peak | 6554 | USA-WA | 2 | 2 | 2010-06-19 | 2019-10-06 | 9 Years, 109 Days Later |
| Mount Rainier | 14411 | USA-WA | 2 | 2 | 2011-09-05 | 2014-08-16 | 2 Years, 345 Days Later |
| Dirty Harrys Balcony | 2613 | USA-WA | 2 | 2 | 2011-11-18 | 2018-11-11 | 6 Years, 358 Days Later |
| Guye Peak | 5168 | USA-WA | 2 | 2 | 2012-07-16 | 2015-09-12 | 3 Years, 58 Days Later |
| Little Si | 1560 | USA-WA | 2 | 2 | 2013-03-23 | 2019-05-02 | 6 Years, 40 Days Later |
| Granite Mountain | 5629 | USA-WA | 2 | 2 | 2014-06-07 | 2017-07-20 | 3 Years, 43 Days Later |
| Silver Peak | 5605 | USA-WA | 2 | 2 | 2015-03-29 | 2015-07-25 | 118 Days Later |
| Red Mountain | 5890 | USA-WA | 2 | 2 | 2015-05-09 | 2018-09-15 | 3 Years, 129 Days Later |
| Lundin Peak | 6057 | USA-WA | 2 | 2 | 2015-06-20 | 2016-07-15 | 1 Year, 25 Days Later |
| Tinkham Peak | 5398 | USA-WA | 2 | 2 | 2015-07-25 | 2016-06-09 | 320 Days Later |
| The Castle | 6440 | USA-WA | 2 | 2 | 2016-05-06 | 2017-08-27 | 1 Year, 113 Days Later |
| Colchuck Peak | 8705 | USA-WA | 2 | 2 | 2016-05-22 | 2018-06-02 | 2 Years, 11 Days Later |
| Dragontail Peak | 8840 | USA-WA | 2 | 2 | 2016-05-27 | 2016-07-02 | 36 Days Later |
| Tiger Mountain | 3004 | USA-WA | 2 | 2 | 2016-12-04 | 2019-12-28 | 3 Years, 24 Days Later |
| Thompson Point | 5124 | USA-WA | 2 | 2 | 2018-03-04 | 2018-11-19 | 260 Days Later |
| Putrid Petes Peak | 5200 | USA-WA | 2 | 2 | 2018-05-06 | 2018-11-20 | 198 Days Later |
| Mount Fremont Lookout | 7181 | USA-WA | 2 | 2 | 2019-08-28 | 2019-09-05 | 8 Days Later |
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