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SF MARATHON 1ST HALF 2026

Nathan Tsai

Bib: 18033•M•Age: 34

Hillsborough, CA

0:00
0:00
/ mi
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Overall
#0 / 6575
Gender (Male)
#0 / 3619
Division (M30-34)
#0 / 772
Race Day Weather
59°/49°F
scattered clouds

⏱️ Race Timeline

Course Elevation
10–277 ft
≈
×22story building
•▲ 774 ft climb · ▼ 557 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
2M
10:56/mi
21:52
→ flat
4M
11:09/mi
44:10
↑ 67↓ 69
6M
12:06/mi
1:08:22
↑ 1231.1%
8M
13:08/mi
1:34:39
↑ 166↓ 531.1%
9.6M
13:08/mi
1:55:40
↑ 68↓ 1931.5%
10M
26:52/mi
2:06:24
↓ 241.1%
10.5M
6:38/mi
2:09:43
↓ 732.7%
12M
16:45/mi
2:34:50
↑ 2803.2%
Finish· 13.11 mi
11:26/mi
2:47:31
↑ 14↓ 891.3%

The Course

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Half Splits

1st Half· via 6MFaster
Distance6.00 mi
Time1:08:22
Pace11:24 /mi
2nd Half
Distance7.11 mi
Time1:39:09
Pace13:57 /mi
📊Positive Split: 45.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
2M
2.00 mi07:09:1421:5210:5621:52
10:56
-
4M
4.00 mi07:31:3244:1011:0322:18
11:09
+0:13
6M
6.00 mi07:55:441:08:2211:2424:12
12:06
+0:57
8M
8.00 mi08:22:011:34:3911:5026:17
13:08
+1:02
9.6M
9.60 mi08:43:021:55:4012:0321:01
13:08
0:00
10M
10.00 mi08:53:462:06:2412:3810:44
26:52
+13:44
10.5M
10.50 mi08:57:052:09:4312:213:19
6:38
-20:14
12M
12.00 mi09:22:122:34:5012:5425:07
16:45
+10:07
Finish
13.11 mi09:34:532:47:3112:4712:41
11:26
-5:19

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

6:38 /mi

Average Pace

12:47 /mi

Slowest Pace

26:52 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:19

2% of race

Time at Steady Pace

2:08:21

77% of race

Time at Slower Pace

35:51

21% of race

Average Pace: 12:47 /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 mi07:09:1421:5210:5621:52
10:56
#4600
4M
4.00 mi07:31:3244:1011:0322:18
11:09
#4451
6M
6.00 mi07:55:441:08:2211:2424:12
12:06
#4764
8M
8.00 mi08:22:011:34:3911:5026:17
13:08
#5035
9.6M
9.60 mi08:43:021:55:4012:0321:01
13:08
#5451
10M
10.00 mi08:53:462:06:2412:3810:44
26:52
#5562
10.5M
10.50 mi08:57:052:09:4312:213:19
6:38
#5579
12M
12.00 mi09:22:122:34:5012:5425:07
16:45
#5467
Finish
13.11 mi09:34:532:47:3112:4712:41
11:26
#5334
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior
Featured Segment

Garmin Challenge

Top 91%
Garmin Challenge
Course map with the garmin challenge highlighted
Garmin Challenge · 9.6–10.5 mi · © Mapbox © OpenStreetMap

14:03

Segment Time

15:37/mi

Pace

0.90 mi

Distance

Overall

5963

Men

3352

Division

715

See the full Garmin Challenge leaderboard

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM30-34Seg. OverallSeg. MalesSeg. M30-34
2M2.00 mi2.00 mi460028726004705(Top 72%)2809(Top 78%)607(Top 79%)
4M4.00 mi2.00 mi4451+1492795+77585+154442(Top 68%)2783(Top 77%)584(Top 76%)
6M6.00 mi2.00 mi4764-3132941-146617-325176(Top 79%)3116(Top 86%)672(Top 87%)
8M8.00 mi2.00 mi5035-2713074-133651-345532(Top 84%)3260(Top 90%)693(Top 90%)
9.6M9.60 mi1.60 mi5451-4163232-158694-436321(Top 96%)3512(Top 97%)747(Top 97%)
10M10.00 mi0.40 mi5562-1113269-37701-76008(Top 91%)3370(Top 93%)716(Top 93%)
10.5M10.50 mi0.50 mi5579-173274-5702-15977(Top 91%)3375(Top 93%)713(Top 92%)
12M12.00 mi1.50 mi5467+1123212+62691+114705(Top 72%)2809(Top 78%)607(Top 79%)
Finish13.11 mi1.11 mi5334+1333149+63683+84483(Top 68%)2687(Top 74%)577(Top 75%)

Segment Performance Analysis

10.5M→12M

0.0 - 2.0 mi

Top 72%
~flat
+5ft-3ft

Overall

4705

Males

2809

M30-34

609

2M→4M

2.0 - 4.0 mi

Top 68%
×4story building
+67ft-69ft

Overall

4442

Males

2783

M30-34

587

4M→6M

4.0 - 6.0 mi

Top 79%
×9story building
+123ft-9ft

Overall

5176

Males

3116

M30-34

674

6M→8M

6.0 - 8.0 mi

Top 84%
×12story building
+166ft-53ft

Overall

5532

Males

3260

M30-34

695

8M→9.6M

8.0 - 9.6 mi

Top 96%
×13story building
+68ft-193ft

Overall

6321

Males

3512

M30-34

749

9.6M→10M

9.6 - 10.0 mi

Top 91%
×2story building
+0ft-24ft

Overall

6008

Males

3370

M30-34

718

10M→10.5M

10.0 - 10.5 mi

Top 91%
×6story building
+1ft-73ft

Overall

5977

Males

3375

M30-34

715

10.5M→12M

10.5 - 12.0 mi

Top 72%
×21story building
+280ft-26ft

Overall

4705

Males

2809

M30-34

609

12M→Finish

12.0 - 13.1 mi

Top 68%
×7story building
+14ft-89ft

Overall

4483

Males

2687

M30-34

577

Passing Analysis

Category:
Athletes Passed
670*
Passed By
1404
Net Change
-734
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 2M----#4600
2M → 4M252103+149#4600#4451
4M → 6M54*367-313#4451#4764
6M → 8M44*315-271#4764#5035
8M → 9.6M1417-416#5035#5451
9.6M → 10M11122-111#5451#5562
10M → 10.5M1027-17#5562#5579
10.5M → 12M152*40+112#5579#5467
12M → Finish146*13+133#5467#5334
TOTALS670*1404-734

* 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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Official Timing Data

The San Francisco Marathon

The San Francisco Marathon

Race Place Events

Race Place Events