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SF MARATHON 2ND HALF 2026

Serene Chu

Bib: 25613•F•Age: 45

San Francisco, CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 3840
Gender (Female)
#0 / 1760
Top 47%
Masters (Masters Women)
#0 / 365
Top 34%
Division (F45-49)
#0 / 81
Top 35%
Race Day Weather
59°/49°F
scattered clouds

⏱️ Race Timeline

Course Elevation
9–292 ft
≈
×24story building
•▲ 548 ft climb · ▼ 587 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
2M
10:32/mi
21:05
↑ 138↓ 680.7%
4M
9:24/mi
39:53
↑ 1631.4%
6M
12:32/mi
1:04:58
↑ 55↓ 830.3%
8M
8:01/mi
1:21:01
↑ 65↓ 1510.8%
10M
12:37/mi
1:46:14
↑ 61↓ 1741.1%
12M
10:53/mi
2:08:01
↑ 41↓ 530.1%
Finish· 13.11 mi
10:32/mi
2:19:42
→ flat

The Course

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Half Splits

1st Half· via 6MFaster
Distance6.00 mi
Time1:04:58
Pace10:50 /mi
2nd Half
Distance7.11 mi
Time1:14:44
Pace10:31 /mi
📊Positive Split: 15.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
2M
2.00 mi09:07:4621:0510:3221:05
10:32
-
4M
4.00 mi09:26:3439:539:5818:48
9:24
-1:08
6M
6.00 mi09:51:391:04:5810:5025:05
12:32
+3:08
8M
8.00 mi10:07:421:21:0110:0816:03
8:01
-4:31
10M
10.00 mi10:32:551:46:1410:3725:13
12:37
+4:36
12M
12.00 mi10:54:422:08:0110:4021:47
10:53
-1:44
Finish
13.11 mi11:06:232:19:4210:3911:41
10:32
-0:21

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

8:01 /mi

Average Pace

10:39 /mi

Slowest Pace

12:37 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

34:51

25% of race

Time at Steady Pace

54:33

39% of race

Time at Slower Pace

50:18

36% of race

Average Pace: 10:39 /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 mi09:07:4621:0510:3221:05
10:32
#2487
4M
4.00 mi09:26:3439:539:5818:48
9:24
#2161
6M
6.00 mi09:51:391:04:5810:5025:05
12:32
#2153
8M
8.00 mi10:07:421:21:0110:0816:03
8:01
#2162
10M
10.00 mi10:32:551:46:1410:3725:13
12:37
#2407
12M
12.00 mi10:54:422:08:0110:4021:47
10:53
#2276
Finish
13.11 mi11:06:232:19:4210:3911:41
10:32
#2239
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
2M2.00 mi2.00 mi2487942371854(Top 48%)658(Top 37%)27(Top 33%)
4M4.00 mi2.00 mi2161+326777+16530+71928(Top 50%)661(Top 38%)26(Top 32%)
6M6.00 mi2.00 mi2153+8766+1128+22184(Top 57%)785(Top 45%)28(Top 35%)
8M8.00 mi2.00 mi2162-9771-5282252(Top 59%)815(Top 46%)28(Top 35%)
10M10.00 mi2.00 mi2407-245899-12830-23014(Top 78%)1261(Top 72%)50(Top 62%)
12M12.00 mi2.00 mi2276+131838+6128+21854(Top 48%)658(Top 37%)27(Top 33%)
Finish13.11 mi1.11 mi2239+37822+16281879(Top 49%)689(Top 39%)26(Top 32%)

Segment Performance Analysis

10M→12M

0.0 - 2.0 mi

Top 48%
×9story building
+138ft-68ft

Overall

1854

Females

658

F45-49

27

2M→4M

2.0 - 4.0 mi

Top 50%
×13story building
+163ft-19ft

Overall

1928

Females

661

F45-49

26

4M→6M

4.0 - 6.0 mi

Top 57%
×4story building
+55ft-83ft

Overall

2184

Females

785

F45-49

28

6M→8M

6.0 - 8.0 mi

Top 59%
×10story building
+65ft-151ft

Overall

2252

Females

815

F45-49

28

8M→10M

8.0 - 10.0 mi

Top 78%
×10story building
+61ft-174ft

Overall

3014

Females

1261

F45-49

50

10M→12M

10.0 - 12.0 mi

Top 48%
×3story building
+41ft-53ft

Overall

1854

Females

658

F45-49

27

12M→Finish

12.0 - 13.1 mi

Top 49%
×1human
+6ft-6ft

Overall

1879

Females

689

F45-49

26

Passing Analysis

Category:
Athletes Passed
609*
Passed By
361
Net Change
+248
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 2M----#2487
2M → 4M33711+326#2487#2161
4M → 6M6355+8#2161#2153
6M → 8M2938-9#2153#2162
8M → 10M3*248-245#2162#2407
10M → 12M1354+131#2407#2276
12M → Finish42*5+37#2276#2239
TOTALS609*361+248

* 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