Mt. Tamalpais February 1, 1885

Joe Breeze brought this to my attention, a while ago. Mill Valley Library has the East Peak register. The first bike entry within is from Feb 1, 1885.  They most likely rode up the brand new Eldridge Grade, and were no doubt on ordinaries, or high-wheel bikes. I imagine there wasn't a lot of easy riding, in either direction. 

Sunday, February 1st 1885
Left Tamalpais Stn. 9 A. M. arrived on
summit 11.55, pretty hard work as trail
was not very dry. Weather foggy and windy
Good lunch and plenty of drink in store for us
when we get through with this.
C. T. Morrison
W. E. Nachtrieb
Member of the Nemean Club and Bay City Wheelmen
Would like to meet E. K. Knowlton on one of his many trips to this popular Summit Resort
Will ride down the new road on our bicycles as soon as weather is settled.

photo courtesy Joe Breeze

It's hard to read the writing, but I'm fairly sure that's C. T. Morrison and W. E. Nachtrieb. I found this article from the April 26, 1884 issue of Breeder and Sportsman, mentioning both men:

ATHLETICS.
Nemean Athletic Exhibition-A fine Programme and a Large Audience. The third annual exhibition of this club took place Friday evening, April 18th, at the club rooms, Twenty-first and Howard streets. [South Van Ness used to be Howard Street. - MF] It must have been extremely gratifying to the club members, and particularly the gentlemen who worked so indefatigably, to notice such a large and enthusiastic audience present to witness their efforts. The programme opened with groupings and pyramid ladders, in which the following club members participated, viz.: Wm. Elder, Geo. Nachtrieb, J. H. Donlon, H. F. Marsh, Jr., W. E. Nachtrieb, George Day, C. T. Morrison, C. H. Miller, W. M. Meeker, W. Day, F.C. Morgan, S. Silverstone, G. Grabill, and J. O. McKown. The horizontal bar performance by C. J. Shuster, C. Shuster, J. Garbutt, R. T. Stombs, and S. Silverstone gained much applause. Hiram Cook's club swinging was as usual very good. The following members gave an exhibition on the parallel bars, C. T. Morrison, W. M. Meeker, Geo. Nachtrieb, W. E. Nachtrieb, Wm. Elder and S. Silverstone. The clown act by R. T. Stombs and J. Garbutt caused a great deal of amusement. Chas. W. Sprague, W. H. Cook and Hiram Cook next gave an exhibition with the biceptor. The tumbling antics indulged in did not add effect to the exhibition. R. T. Stombs and J. Garbutt then gave an exhibition of acrobatic feats, which were not up to their generally high standard. The boxing by T. McCord and W. S. Arnold was very spirited, but the former gentleman showing a very slight advantage. The smallness of the stage interfered with the success of the tug-of-war. The songs and recitations interspersed throughout the programme were all capitally rendered, and the flag swinging of the young ladies of the Turn-Verein showed excellent training. The Nemean Club have splendid material, and it is to be hoped that some of them will will compete in the next Olympic sport.

from Breeder and Sportsman, April 26, 1884

Meeker is in a lot of my posts, check "The Further Adventures of Meeker and Knapp" towards the bottom of https://fastestslowguy.blogspot.com/2018/04/to-summit-of-mount-diablo-by-wheel-san.html.

'Cyclistic.
The Oakland Club will take a more active part in the sport during the coming season. The roads on the other side of the bay are in excellent order.
At the semi-annual meeting of the Bay City Wheelmen the following were elected officers for the ensuing term: President, E. Mohrig; Vice-President S. F. Booth Jr.; Secretary, Thomas L. Hill; Treasurer, W. E. Nachtrieb; Captain, F. R. Cook; First-Lieutenant, Charles L. Davis; Second-Lieutenant, H. Houseworth; Butler, W. F. Sperbeck.
Carl Kron's "Ten Thousand Miles on a Bicycle" will probably appear in March.
William Woodside wants to ride John S. Prince five races at tbe following distances: Ten, fifteen, twenty, twenty-five and fifty miles for $500 a side and the title of champion of America, the winner of three out of the five races to take the stake and the title.
Fred D. Owen of Washington, D. C., has applied for a patent on a new crank bicycle which is to have its handle-bar behind the rider, the handles bending around to within easy reach.
Professional bicyclists, as a rule are not modest men. But Tom Eck is the exception in this case. He Is desirous of being known as the father of bicycling in America.

Cyclistic W. E. Nachtrieb Tue, Jan 20, 1885 – Page 3 · San Francisco Chronicle (San Francisco, San Francisco, California) · Newspapers.com

W. E. Nachtrieb was a member of the Nemean Club, and represented it in the Pacific Coast Amateur Athletic Association, which was I believe the regional body referenced in the "Coast Records" mentioned in other cycling articles of the time. Notice that C. Morrison is on a committee, I'd bet that's C. T. Morrison.

AMATEUR ATHLETICS.
Final Organization of a Long-Needed Association.
A meeting of the Pacific Coast Amateur Athletic Association was held last evening in the rooms of the Olympic Club. W. C. Brown presided and Robert Gibson acted as Secretary. W. C. Brown, V. C. Driffield, Thomas Jennings, A. M. Campbell, J. F. Connor, C. Creighton, F. R. Cook, G. F. Day, T. Scanlon and R. Gibson represented the following clubs: Olympic, Merion, Bay City, Acme, Brooklyn and Nemean. The meeting effected a permanent organization by electing the following officers: President, W. Greer Harrison of the Olympic Club; Vice-President, Colonel George Edwards, University of California; Secretary, Robert Gibson, Merion Cricket Club; Treasurer, V. C. Driffield, Olympic Club; Executive Committee - W. C. Brown, Olympic Club; W. E. Nachtrieb, Nemean; T. F. Scanlon, Acme; C. Creighton, Merion; C. Downey, Brooklyn; F. R. Cook and T. F. Day, Bay City Wheelmen, the Secretary and the Treasurer.
Thomas Jennings, A. M. Campbell, E. Mohrig, J. J. Theobald, C. Morrison and W. O. Cullen, were appointed a committee to consider the advisability of giving an indoor entertainment for the purpose of obtaining finances.
Applications ror reinstatement into the ranks of amateurdom from P. N. Gafney, R. Lutinger, John H. Walker, E. T. Ezeikel and J. H. Flynn, were referred to the Executive Committee for action.
The meeting then adjourned, to meet on the second Tuesday evening of April.
The Executive Committee then organized by electing W. C. Brown, Chairman and C. Downey Vice-Chairman.

Pacific Coast Amateur Athletic Association Nachtrieb Wed, Mar 11, 1885 – 1 · The San Francisco Examiner (San Francisco, California, United States of America) · Newspapers.com
Tamalpais Station later became Kentfield Station. This 1913 USGS map shows that it was near what is now College of Marin. They would have likely ridden northwest on what's now Sir Francis Drake Boulevard to Ross, then the Lagunitas road to Eldridge Grade,

Interestingly, if you play with the opacity slider and pan around, you can see that much of the land in Corte Madera and Larkspur was unusable marsh, then. Sir Francis Drake Blvd and Magnolia Avenue bordered this delta, now it has highway 101 and shops and homes on it:

This article from 1890 states:

Messrs. Thompson, Meeker, Doane, Wetmore, Hammer, Plummer, Knapp, Spaulding and Landis, of the Bay City Wheelmen, made a trip to the top of Mount Tamalpais on the 17th inst. The trip was pronounced the most enjoyable run of the season by all who were fortunate enough to reach the summit, where lunch was served at the “hidden spring” at noon.
Knapp and Hammer are the first who ever had their wheels crown the peak of Tamalpais, an achievement they may well be proud of, as the last half mile (where the others left their wheels) is covered with brush and loose rocks.
Coming down, Meeker, Doane and Plummer rode their machines to their sorrow, and on reaching the bottom presented a sorry spectacle, for the thorns were long and searching, and the headers not infrequent; otherwise the coasting down the mountain side was voted splendid.

Perhaps they did not sign the register, as Nachtrieb and Morrison did? Or perhaps their summit pre-dated the register?

Notice the byline in the linked article about E. K. Knowlton? Take a few minutes and read that, especially the bit toward the end about Tamalpais. The byline is Harold French. You'll be seeing his name again, in this blog. His work for the Tamalpais Conservation Club did just that; lead to parkland that preserved Mt. Tam as a park. If you know Oakland trails, the French trail is named for him. His campaigning for park land led to the establishment of Sequoiah Park, which later became Joaquin Miller Park. You can read more about French in Amelia Sue Marshall's East Bay Hills: A Brief History.