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The most commonly misspelled peak in Oregon and one of a handful of alpine rock routes, this is a fairly easy day climb. It may look quite challenging from the start, but the technical climbing is just one pitch of easy 5th class rock at the top. Duct taping your boot tops is recommended for the scree descent. An apres climb swim in Diamond Lake is recommended.
Known as “the Lightning Rod of the Cascades”, the striking summit of Mt. Thielsen is the 7th highest peak in Oregon. The peak was named for a pioneer road builder, Hans Thielsen. It is similar in age and structure to Three Fingered Jack and Mt Washington, where glaciation and other types of erosion have left a relatively solid exposed plug of basaltic andesite. The plug is excellent rock in contrast to the rest of the mountain, which is generally poor. There is a small remnant glacier on Thielsen, and thus summiting this peak qualifies one for Mazamas membership.
The first ascent was done in 1883.
Activity Notes
Queerzamas climb: this climb is a queer affinity space climb, where all participants and leaders self-identify as part of the queer community. Please send me a quick email message to apply. Mt. Thielsen / Stardard Route During Queerzamas climbs, we are committed to cultivating a supportive and inclusive learning environment for all participants. We proudly affirm that this course is LGBTQ+ friendly and supportive, welcoming individuals of all gender identities and sexual orientations. We honor and respect each person's gender pronouns. Additionally, we strive to create a positive and supportive space that embraces diversity in all its forms. Regardless of race, age, gender, or life background, everyone is valued and respected here. It's our expectation that every applicant and accepted student will actively contribute to maintaining this safe and inclusive environment. Anticipate engaging in respectful dialogue and offering mutual support as we collectively strive for a positive and enriching alpine climbing experience.| Other Information | |
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| Driving Distance from Portland | 250 miles |
| Driving Time from Portland | 5 hours |
| General Route Info | summitpost https://www.summitpost.org/mount-thielsen/150419 mountain forecast https://www.mountain-forecast.com/peaks/Mount-Thielsen/forecasts/2797 |
| Expected Duration | Car to car in one day |
| Relevant Books | Oregon High by Jeff Thomas |
| Relevant Maps | USGS 7 minute series, Mt. Thielsen and Diamond Lake Google map https://goo.gl/maps/xg6vS1k4prQ2 |
| Useful Links | GPS Track GPS Coordinates Map |
