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SF MARATHON 1ST HALF 2026

Tsz Kee Siu

Bib: 13633•M•Age: 47

Pleasanton, CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 6575
Gender (Male)
#0 / 3619
Masters (Masters Men)
#0 / 1030
Division (M45-49)
#0 / 220
Race Day Weather
59°/49°F
scattered clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
2M
23:37
Rank: #5717
Start → 2M
11:48/mi
23:37 split
4M
52:31
Rank: #6340 (-623)
2M → 4M
14:27/mi
28:54 split
6M
1:23:32
Rank: #6429 (-89)
4M → 6M
15:30/mi
31:01 split
8M
1:56:13
Rank: #6457 (-28)
6M → 8M
16:20/mi
32:41 split
9.6M
2:22:22
Rank: #6543 (-86)
8M → 9.6M
16:20/mi
26:09 split
10M
2:34:44
Rank: #6549 (-6)
9.6M → 10M
30:57/mi
12:22 split
10.5M
2:39:19
Rank: #6551 (-2)
10M → 10.5M
9:10/mi
4:35 split
12M
3:15:03
Rank: #6560 (-9)
10.5M → 12M
23:49/mi
35:44 split
Finish· 13.11 mi
3:34:02
Rank: #6545 (+15)
12M → Finish
17:07/mi
18:59 split

The Course

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Half Splits

1st Half· via 6MFaster
Distance6.00 mi
Time1:23:32
Pace13:55 /mi
2nd Half
Distance7.11 mi
Time2:10:30
Pace18:21 /mi
📊Positive Split: 56.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
2M
2.00 mi07:00:3923:3711:4823:37
11:48
-
4M
4.00 mi07:29:3352:3113:0828:54
14:27
+2:39
6M
6.00 mi08:00:341:23:3213:5531:01
15:30
+1:03
8M
8.00 mi08:33:151:56:1314:3232:41
16:20
+0:50
9.6M
9.60 mi08:59:242:22:2214:5026:09
16:20
0:00
10M
10.00 mi09:11:462:34:4415:2812:22
30:57
+14:37
10.5M
10.50 mi09:16:212:39:1915:104:35
9:10
-21:47
12M
12.00 mi09:52:053:15:0316:1535:44
23:49
+14:39
Finish
13.11 mi10:11:043:34:0216:2018:59
17:07
-6:42

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

9:10 /mi

Average Pace

16:20 /mi

Slowest Pace

30:57 /mi

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Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

28:12

13% of race

Time at Steady Pace

2:17:44

64% of race

Time at Slower Pace

48:06

22% of race

Average Pace: 16:20 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi3.3mi6.6mi9.8mi13.1mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
2M
2.00 mi07:00:3923:3711:4823:37
11:48
#5717
4M
4.00 mi07:29:3352:3113:0828:54
14:27
#6340
6M
6.00 mi08:00:341:23:3213:5531:01
15:30
#6429
8M
8.00 mi08:33:151:56:1314:3232:41
16:20
#6457
9.6M
9.60 mi08:59:242:22:2214:5026:09
16:20
#6543
10M
10.00 mi09:11:462:34:4415:2812:22
30:57
#6549
10.5M
10.50 mi09:16:212:39:1915:104:35
9:10
#6551
12M
12.00 mi09:52:053:15:0316:1535:44
23:49
#6560
Finish
13.11 mi10:11:043:34:0216:2018:59
17:07
#6545
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior
Featured Segment

Garmin Challenge

Top 98%
Garmin Challenge
Course map with the garmin challenge highlighted
Garmin Challenge · 9.6–10.5 mi · © Mapbox © OpenStreetMap

16:57

Segment Time

18:50/mi

Pace

0.90 mi

Distance

Overall

6458

Men

3555

Division

213

See the full Garmin Challenge leaderboard

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
2M2.00 mi2.00 mi571733201876523(Top 99%)3587(Top 99%)218(Top 99%)
4M4.00 mi2.00 mi6340-6233553-233207-206476(Top 98%)3595(Top 99%)213(Top 97%)
6M6.00 mi2.00 mi6429-893580-27211-46503(Top 99%)3607(Top 100%)216(Top 98%)
8M8.00 mi2.00 mi6457-283588-8213-26469(Top 98%)3588(Top 99%)217(Top 99%)
9.6M9.60 mi1.60 mi6543-863610-22218-56577(Top 100%)3620(Top 100%)220(Top 100%)
10M10.00 mi0.40 mi6549-63612-2219-16450(Top 98%)3550(Top 98%)212(Top 96%)
10.5M10.50 mi0.50 mi6551-236122196527(Top 99%)3589(Top 99%)219(Top 100%)
12M12.00 mi1.50 mi6560-93613-1220-16523(Top 99%)3587(Top 99%)218(Top 99%)
Finish13.11 mi1.11 mi6545+153609+42206449(Top 98%)3558(Top 98%)215(Top 98%)

Segment Performance Analysis

10.5M→12M

0.0 - 2.0 mi

Top 99%
~flat
+5ft-3ft

Overall

6523

Males

3587

M45-49

218

2M→4M

2.0 - 4.0 mi

Top 98%
×4story building
+67ft-69ft

Overall

6476

Males

3595

M45-49

213

4M→6M

4.0 - 6.0 mi

Top 99%
×9story building
+123ft-9ft

Overall

6503

Males

3607

M45-49

216

6M→8M

6.0 - 8.0 mi

Top 98%
×12story building
+166ft-53ft

Overall

6469

Males

3588

M45-49

217

8M→9.6M

8.0 - 9.6 mi

Top 100%
×13story building
+68ft-193ft

Overall

6577

Males

3620

M45-49

220

9.6M→10M

9.6 - 10.0 mi

Top 98%
×2story building
+0ft-24ft

Overall

6450

Males

3550

M45-49

212

10M→10.5M

10.0 - 10.5 mi

Top 99%
×6story building
+1ft-73ft

Overall

6527

Males

3589

M45-49

219

10.5M→12M

10.5 - 12.0 mi

Top 99%
×21story building
+280ft-26ft

Overall

6523

Males

3587

M45-49

218

12M→Finish

12.0 - 13.1 mi

Top 98%
×7story building
+14ft-89ft

Overall

6449

Males

3558

M45-49

215

Passing Analysis

Category:
Athletes Passed
78*
Passed By
906
Net Change
-828
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 2M----#5717
2M → 4M4*627-623#5717#6340
4M → 6M19*108-89#6340#6429
6M → 8M22*50-28#6429#6457
8M → 9.6M4*90-86#6457#6543
9.6M → 10M410-6#6543#6549
10M → 10.5M02-2#6549#6551
10.5M → 12M7*16-9#6551#6560
12M → Finish18*3+15#6560#6545
TOTALS78*906-828

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

Passing Visuals

Category:
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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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The San Francisco Marathon

The San Francisco Marathon

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